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JTable (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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javax.swing
Class JTable

java.lang.Object
  java.awt.Component
      java.awt.Container
          javax.swing.JComponent
              javax.swing.JTable

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, EventListener, Accessible, CellEditorListener, ListSelectionListener, RowSorterListener, TableColumnModelListener, TableModelListener, Scrollable

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public class JTable
extends JComponent
implements TableModelListener, Scrollable, TableColumnModelListener, ListSelectionListener, CellEditorListener, Accessible, RowSorterListener

The JTable is used to display and edit regular two-dimensional tables of cells. See How to Use Tables in The Java Tutorial for task-oriented documentation and examples of using JTable.

The JTable has many facilities that make it possible to customize its rendering and editing but provides defaults for these features so that simple tables can be set up easily. For example, to set up a table with 10 rows and 10 columns of numbers:

      TableModel dataModel = new AbstractTableModel() {
          public int getColumnCount() { return 10; }
          public int getRowCount() { return 10;}
          public Object getValueAt(int row, int col) { return new Integer(row*col); }
      };
      JTable table = new JTable(dataModel);
      JScrollPane scrollpane = new JScrollPane(table);
 

Note that if you wish to use a JTable in a standalone view (outside of a JScrollPane) and want the header displayed, you can get it using getTableHeader() and display it separately.

To enable sorting and filtering of rows, use a RowSorter. You can set up a row sorter in either of two ways:

• Directly set the RowSorter. For example: table.setRowSorter(new TableRowSorter(model)).
• Set the autoCreateRowSorter property to true, so that the JTable creates a RowSorter for you. For example: setAutoCreateRowSorter(true).

When designing applications that use the JTable it is worth paying close attention to the data structures that will represent the table's data. The DefaultTableModel is a model implementation that uses a Vector of Vectors of Objects to store the cell values. As well as copying the data from an application into the DefaultTableModel, it is also possible to wrap the data in the methods of the TableModel interface so that the data can be passed to the JTable directly, as in the example above. This often results in more efficient applications because the model is free to choose the internal representation that best suits the data. A good rule of thumb for deciding whether to use the AbstractTableModel or the DefaultTableModel is to use the AbstractTableModel as the base class for creating subclasses and the DefaultTableModel when subclassing is not required.

The "TableExample" directory in the demo area of the source distribution gives a number of complete examples of JTable usage, covering how the JTable can be used to provide an editable view of data taken from a database and how to modify the columns in the display to use specialized renderers and editors.

The JTable uses integers exclusively to refer to both the rows and the columns of the model that it displays. The JTable simply takes a tabular range of cells and uses getValueAt(int, int) to retrieve the values from the model during painting. It is important to remember that the column and row indexes returned by various JTable methods are in terms of the JTable (the view) and are not necessarily the same indexes used by the model.

By default, columns may be rearranged in the JTable so that the view's columns appear in a different order to the columns in the model. This does not affect the implementation of the model at all: when the columns are reordered, the JTable maintains the new order of the columns internally and converts its column indices before querying the model.

So, when writing a TableModel, it is not necessary to listen for column reordering events as the model will be queried in its own coordinate system regardless of what is happening in the view. In the examples area there is a demonstration of a sorting algorithm making use of exactly this technique to interpose yet another coordinate system where the order of the rows is changed, rather than the order of the columns.

Similarly when using the sorting and filtering functionality provided by RowSorter the underlying TableModel does not need to know how to do sorting, rather RowSorter will handle it. Coordinate conversions will be necessary when using the row based methods of JTable with the underlying TableModel. All of JTables row based methods are in terms of the RowSorter, which is not necessarily the same as that of the underlying TableModel. For example, the selection is always in terms of JTable so that when using RowSorter you will need to convert using convertRowIndexToView or convertRowIndexToModel. The following shows how to convert coordinates from JTable to that of the underlying model:

   int[] selection = table.getSelectedRows();
   for (int i = 0; i < selection.length; i++) {
     selection[i] = table.convertRowIndexToModel(selection[i]);
   }
   // selection is now in terms of the underlying TableModel
 

By default if sorting is enabled JTable will persist the selection and variable row heights in terms of the model on sorting. For example if row 0, in terms of the underlying model, is currently selected, after the sort row 0, in terms of the underlying model will be selected. Visually the selection may change, but in terms of the underlying model it will remain the same. The one exception to that is if the model index is no longer visible or was removed. For example, if row 0 in terms of model was filtered out the selection will be empty after the sort.

J2SE 5 adds methods to JTable to provide convenient access to some common printing needs. Simple new print() methods allow for quick and easy addition of printing support to your application. In addition, a new getPrintable(javax.swing.JTable.PrintMode, java.text.MessageFormat, java.text.MessageFormat) method is available for more advanced printing needs.

As for all JComponent classes, you can use InputMap and ActionMap to associate an Action object with a KeyStroke and execute the action under specified conditions.

Warning: Swing is not thread safe. For more information see Swing's Threading Policy.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans^TM has been added to the java.beans package. Please see XMLEncoder.

See Also:

DefaultTableModel, TableRowSorter

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Nested Class Summary
protected  class	JTable.AccessibleJTable           This class implements accessibility support for the JTable class.
static class	JTable.DropLocation           A subclass of TransferHandler.DropLocation representing a drop location for a JTable.
static class	JTable.PrintMode           Printing modes, used in printing JTables.

 

Nested classes/interfaces inherited from class javax.swing.JComponent
JComponent.AccessibleJComponent

 

Nested classes/interfaces inherited from class java.awt.Container
Container.AccessibleAWTContainer

 

Nested classes/interfaces inherited from class java.awt.Component
Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

 

Field Summary
static int	AUTO_RESIZE_ALL_COLUMNS           During all resize operations, proportionately resize all columns.
static int	AUTO_RESIZE_LAST_COLUMN           During all resize operations, apply adjustments to the last column only.
static int	AUTO_RESIZE_NEXT_COLUMN           When a column is adjusted in the UI, adjust the next column the opposite way.
static int	AUTO_RESIZE_OFF           Do not adjust column widths automatically; use a scrollbar.
static int	AUTO_RESIZE_SUBSEQUENT_COLUMNS           During UI adjustment, change subsequent columns to preserve the total width; this is the default behavior.
protected  boolean	autoCreateColumnsFromModel           The table will query the TableModel to build the default set of columns if this is true.
protected  int	autoResizeMode           Determines if the table automatically resizes the width of the table's columns to take up the entire width of the table, and how it does the resizing.
protected  TableCellEditor	cellEditor           The active cell editor object, that overwrites the screen real estate occupied by the current cell and allows the user to change its contents.
protected  boolean	cellSelectionEnabled           Obsolete as of Java 2 platform v1.3.
protected  TableColumnModel	columnModel           The TableColumnModel of the table.
protected  TableModel	dataModel           The TableModel of the table.
protected  Hashtable	defaultEditorsByColumnClass           A table of objects that display and edit the contents of a cell, indexed by class as declared in getColumnClass in the TableModel interface.
protected  Hashtable	defaultRenderersByColumnClass           A table of objects that display the contents of a cell, indexed by class as declared in getColumnClass in the TableModel interface.
protected  int	editingColumn           Identifies the column of the cell being edited.
protected  int	editingRow           Identifies the row of the cell being edited.
protected  Component	editorComp           If editing, the Component that is handling the editing.
protected  Color	gridColor           The color of the grid.
protected  Dimension	preferredViewportSize           Used by the Scrollable interface to determine the initial visible area.
protected  int	rowHeight           The height in pixels of each row in the table.
protected  int	rowMargin           The height in pixels of the margin between the cells in each row.
protected  boolean	rowSelectionAllowed           True if row selection is allowed in this table.
protected  Color	selectionBackground           The background color of selected cells.
protected  Color	selectionForeground           The foreground color of selected cells.
protected  ListSelectionModel	selectionModel           The ListSelectionModel of the table, used to keep track of row selections.
protected  boolean	showHorizontalLines           The table draws horizontal lines between cells if showHorizontalLines is true.
protected  boolean	showVerticalLines           The table draws vertical lines between cells if showVerticalLines is true.
protected  JTableHeader	tableHeader           The TableHeader working with the table.

 

Fields inherited from class javax.swing.JComponent
accessibleContext, listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

 

Fields inherited from class java.awt.Component
BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

 

Fields inherited from interface java.awt.image.ImageObserver
ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

 

Constructor Summary
JTable()           Constructs a default JTable that is initialized with a default data model, a default column model, and a default selection model.
JTable(int numRows, int numColumns)           Constructs a JTable with numRows and numColumns of empty cells using DefaultTableModel.
JTable(Object[][] rowData, Object[] columnNames)           Constructs a JTable to display the values in the two dimensional array, rowData, with column names, columnNames.
JTable(TableModel dm)           Constructs a JTable that is initialized with dm as the data model, a default column model, and a default selection model.
JTable(TableModel dm, TableColumnModel cm)           Constructs a JTable that is initialized with dm as the data model, cm as the column model, and a default selection model.
JTable(TableModel dm, TableColumnModel cm, ListSelectionModel sm)           Constructs a JTable that is initialized with dm as the data model, cm as the column model, and sm as the selection model.
JTable(Vector rowData, Vector columnNames)           Constructs a JTable to display the values in the Vector of Vectors, rowData, with column names, columnNames.

 

Method Summary
void	addColumn(TableColumn aColumn)           Appends aColumn to the end of the array of columns held by this JTable's column model.
void	addColumnSelectionInterval(int index0, int index1)           Adds the columns from index0 to index1, inclusive, to the current selection.
void	addNotify()           Calls the configureEnclosingScrollPane method.
void	addRowSelectionInterval(int index0, int index1)           Adds the rows from index0 to index1, inclusive, to the current selection.
void	changeSelection(int rowIndex, int columnIndex, boolean toggle, boolean extend)           Updates the selection models of the table, depending on the state of the two flags: toggle and extend.
void	clearSelection()           Deselects all selected columns and rows.
void	columnAdded(TableColumnModelEvent e)           Invoked when a column is added to the table column model.
int	columnAtPoint(Point point)           Returns the index of the column that point lies in, or -1 if the result is not in the range [0, getColumnCount()-1].
void	columnMarginChanged(ChangeEvent e)           Invoked when a column is moved due to a margin change.
void	columnMoved(TableColumnModelEvent e)           Invoked when a column is repositioned.
void	columnRemoved(TableColumnModelEvent e)           Invoked when a column is removed from the table column model.
void	columnSelectionChanged(ListSelectionEvent e)           Invoked when the selection model of the TableColumnModel is changed.
protected  void	configureEnclosingScrollPane()           If this JTable is the viewportView of an enclosing JScrollPane (the usual situation), configure this ScrollPane by, amongst other things, installing the table's tableHeader as the columnHeaderView of the scroll pane.
int	convertColumnIndexToModel(int viewColumnIndex)           Maps the index of the column in the view at viewColumnIndex to the index of the column in the table model.
int	convertColumnIndexToView(int modelColumnIndex)           Maps the index of the column in the table model at modelColumnIndex to the index of the column in the view.
int	convertRowIndexToModel(int viewRowIndex)           Maps the index of the row in terms of the view to the underlying TableModel.
int	convertRowIndexToView(int modelRowIndex)           Maps the index of the row in terms of the TableModel to the view.
protected  TableColumnModel	createDefaultColumnModel()           Returns the default column model object, which is a DefaultTableColumnModel.
void	createDefaultColumnsFromModel()           Creates default columns for the table from the data model using the getColumnCount method defined in the TableModel interface.
protected  TableModel	createDefaultDataModel()           Returns the default table model object, which is a DefaultTableModel.
protected  void	createDefaultEditors()           Creates default cell editors for objects, numbers, and boolean values.
protected  void	createDefaultRenderers()           Creates default cell renderers for objects, numbers, doubles, dates, booleans, and icons.
protected  ListSelectionModel	createDefaultSelectionModel()           Returns the default selection model object, which is a DefaultListSelectionModel.
protected  JTableHeader	createDefaultTableHeader()           Returns the default table header object, which is a JTableHeader.
static JScrollPane	createScrollPaneForTable(JTable aTable)           Deprecated. As of Swing version 1.0.2, replaced by new JScrollPane(aTable).
void	doLayout()           Causes this table to lay out its rows and columns.
boolean	editCellAt(int row, int column)           Programmatically starts editing the cell at row and column, if those indices are in the valid range, and the cell at those indices is editable.
boolean	editCellAt(int row, int column, EventObject e)           Programmatically starts editing the cell at row and column, if those indices are in the valid range, and the cell at those indices is editable.
void	editingCanceled(ChangeEvent e)           Invoked when editing is canceled.
void	editingStopped(ChangeEvent e)           Invoked when editing is finished.
AccessibleContext	getAccessibleContext()           Gets the AccessibleContext associated with this JTable.
boolean	getAutoCreateColumnsFromModel()           Determines whether the table will create default columns from the model.
boolean	getAutoCreateRowSorter()           Returns true if whenever the model changes, a new RowSorter should be created and installed as the table's sorter; otherwise, returns false.
int	getAutoResizeMode()           Returns the auto resize mode of the table.
TableCellEditor	getCellEditor()           Returns the active cell editor, which is null if the table is not currently editing.
TableCellEditor	getCellEditor(int row, int column)           Returns an appropriate editor for the cell specified by row and column.
Rectangle	getCellRect(int row, int column, boolean includeSpacing)           Returns a rectangle for the cell that lies at the intersection of row and column.
TableCellRenderer	getCellRenderer(int row, int column)           Returns an appropriate renderer for the cell specified by this row and column.
boolean	getCellSelectionEnabled()           Returns true if both row and column selection models are enabled.
TableColumn	getColumn(Object identifier)           Returns the TableColumn object for the column in the table whose identifier is equal to identifier, when compared using equals.
Class<?>	getColumnClass(int column)           Returns the type of the column appearing in the view at column position column.
int	getColumnCount()           Returns the number of columns in the column model.
TableColumnModel	getColumnModel()           Returns the TableColumnModel that contains all column information of this table.
String	getColumnName(int column)           Returns the name of the column appearing in the view at column position column.
boolean	getColumnSelectionAllowed()           Returns true if columns can be selected.
TableCellEditor	getDefaultEditor(Class<?> columnClass)           Returns the editor to be used when no editor has been set in a TableColumn.
TableCellRenderer	getDefaultRenderer(Class<?> columnClass)           Returns the cell renderer to be used when no renderer has been set in a TableColumn.
boolean	getDragEnabled()           Returns whether or not automatic drag handling is enabled.
JTable.DropLocation	getDropLocation()           Returns the location that this component should visually indicate as the drop location during a DnD operation over the component, or null if no location is to currently be shown.
DropMode	getDropMode()           Returns the drop mode for this component.
int	getEditingColumn()           Returns the index of the column that contains the cell currently being edited.
int	getEditingRow()           Returns the index of the row that contains the cell currently being edited.
Component	getEditorComponent()           Returns the component that is handling the editing session.
boolean	getFillsViewportHeight()           Returns whether or not this table is always made large enough to fill the height of an enclosing viewport.
Color	getGridColor()           Returns the color used to draw grid lines.
Dimension	getIntercellSpacing()           Returns the horizontal and vertical space between cells.
TableModel	getModel()           Returns the TableModel that provides the data displayed by this JTable.
Dimension	getPreferredScrollableViewportSize()           Returns the preferred size of the viewport for this table.
Printable	getPrintable(JTable.PrintMode printMode, MessageFormat headerFormat, MessageFormat footerFormat)           Return a Printable for use in printing this JTable.
int	getRowCount()           Returns the number of rows that can be shown in the JTable, given unlimited space.
int	getRowHeight()           Returns the height of a table row, in pixels.
int	getRowHeight(int row)           Returns the height, in pixels, of the cells in row.
int	getRowMargin()           Gets the amount of empty space, in pixels, between cells.
boolean	getRowSelectionAllowed()           Returns true if rows can be selected.
RowSorter<? extends TableModel>	getRowSorter()           Returns the object responsible for sorting.
int	getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction)           Returns visibleRect.height or visibleRect.width, depending on this table's orientation.
boolean	getScrollableTracksViewportHeight()           Returns false to indicate that the height of the viewport does not determine the height of the table, unless getFillsViewportHeight is true and the preferred height of the table is smaller than the viewport's height.
boolean	getScrollableTracksViewportWidth()           Returns false if autoResizeMode is set to AUTO_RESIZE_OFF, which indicates that the width of the viewport does not determine the width of the table.
int	getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction)           Returns the scroll increment (in pixels) that completely exposes one new row or column (depending on the orientation).
int	getSelectedColumn()           Returns the index of the first selected column, -1 if no column is selected.
int	getSelectedColumnCount()           Returns the number of selected columns.
int[]	getSelectedColumns()           Returns the indices of all selected columns.
int	getSelectedRow()           Returns the index of the first selected row, -1 if no row is selected.
int	getSelectedRowCount()           Returns the number of selected rows.
int[]	getSelectedRows()           Returns the indices of all selected rows.
Color	getSelectionBackground()           Returns the background color for selected cells.
Color	getSelectionForeground()           Returns the foreground color for selected cells.
ListSelectionModel	getSelectionModel()           Returns the ListSelectionModel that is used to maintain row selection state.
boolean	getShowHorizontalLines()           Returns true if the table draws horizontal lines between cells, false if it doesn't.
boolean	getShowVerticalLines()           Returns true if the table draws vertical lines between cells, false if it doesn't.
boolean	getSurrendersFocusOnKeystroke()           Returns true if the editor should get the focus when keystrokes cause the editor to be activated
JTableHeader	getTableHeader()           Returns the tableHeader used by this JTable.
String	getToolTipText(MouseEvent event)           Overrides JComponent's getToolTipText method in order to allow the renderer's tips to be used if it has text set.
TableUI	getUI()           Returns the L&F object that renders this component.
String	getUIClassID()           Returns the suffix used to construct the name of the L&F class used to render this component.
boolean	getUpdateSelectionOnSort()           Returns true if the selection should be updated after sorting.
Object	getValueAt(int row, int column)           Returns the cell value at row and column.
protected  void	initializeLocalVars()           Initializes table properties to their default values.
boolean	isCellEditable(int row, int column)           Returns true if the cell at row and column is editable.
boolean	isCellSelected(int row, int column)           Returns true if the specified indices are in the valid range of rows and columns and the cell at the specified position is selected.
boolean	isColumnSelected(int column)           Returns true if the specified index is in the valid range of columns, and the column at that index is selected.
boolean	isEditing()           Returns true if a cell is being edited.
boolean	isRowSelected(int row)           Returns true if the specified index is in the valid range of rows, and the row at that index is selected.
void	moveColumn(int column, int targetColumn)           Moves the column column to the position currently occupied by the column targetColumn in the view.
protected  String	paramString()           Returns a string representation of this table.
Component	prepareEditor(TableCellEditor editor, int row, int column)           Prepares the editor by querying the data model for the value and selection state of the cell at row, column.
Component	prepareRenderer(TableCellRenderer renderer, int row, int column)           Prepares the renderer by querying the data model for the value and selection state of the cell at row, column.
boolean	print()           A convenience method that displays a printing dialog, and then prints this JTable in mode PrintMode.FIT_WIDTH, with no header or footer text.
boolean	print(JTable.PrintMode printMode)           A convenience method that displays a printing dialog, and then prints this JTable in the given printing mode, with no header or footer text.
boolean	print(JTable.PrintMode printMode, MessageFormat headerFormat, MessageFormat footerFormat)           A convenience method that displays a printing dialog, and then prints this JTable in the given printing mode, with the specified header and footer text.
boolean	print(JTable.PrintMode printMode, MessageFormat headerFormat, MessageFormat footerFormat, boolean showPrintDialog, PrintRequestAttributeSet attr, boolean interactive)           Prints this table, as specified by the fully featured print method, with the default printer specified as the print service.
boolean	print(JTable.PrintMode printMode, MessageFormat headerFormat, MessageFormat footerFormat, boolean showPrintDialog, PrintRequestAttributeSet attr, boolean interactive, PrintService service)           Prints this JTable.
protected  boolean	processKeyBinding(KeyStroke ks, KeyEvent e, int condition, boolean pressed)           Invoked to process the key bindings for ks as the result of the KeyEvent e.
void	removeColumn(TableColumn aColumn)           Removes aColumn from this JTable's array of columns.
void	removeColumnSelectionInterval(int index0, int index1)           Deselects the columns from index0 to index1, inclusive.
void	removeEditor()           Discards the editor object and frees the real estate it used for cell rendering.
void	removeNotify()           Calls the unconfigureEnclosingScrollPane method.
void	removeRowSelectionInterval(int index0, int index1)           Deselects the rows from index0 to index1, inclusive.
protected  void	resizeAndRepaint()           Equivalent to revalidate followed by repaint.
int	rowAtPoint(Point point)           Returns the index of the row that point lies in, or -1 if the result is not in the range [0, getRowCount()-1].
void	selectAll()           Selects all rows, columns, and cells in the table.
void	setAutoCreateColumnsFromModel(boolean autoCreateColumnsFromModel)           Sets this table's autoCreateColumnsFromModel flag.
void	setAutoCreateRowSorter(boolean autoCreateRowSorter)           Specifies whether a RowSorter should be created for the table whenever its model changes.
void	setAutoResizeMode(int mode)           Sets the table's auto resize mode when the table is resized.
void	setCellEditor(TableCellEditor anEditor)           Sets the active cell editor.
void	setCellSelectionEnabled(boolean cellSelectionEnabled)           Sets whether this table allows both a column selection and a row selection to exist simultaneously.
void	setColumnModel(TableColumnModel columnModel)           Sets the column model for this table to newModel and registers for listener notifications from the new column model.
void	setColumnSelectionAllowed(boolean columnSelectionAllowed)           Sets whether the columns in this model can be selected.
void	setColumnSelectionInterval(int index0, int index1)           Selects the columns from index0 to index1, inclusive.
void	setDefaultEditor(Class<?> columnClass, TableCellEditor editor)           Sets a default cell editor to be used if no editor has been set in a TableColumn.
void	setDefaultRenderer(Class<?> columnClass, TableCellRenderer renderer)           Sets a default cell renderer to be used if no renderer has been set in a TableColumn.
void	setDragEnabled(boolean b)           Turns on or off automatic drag handling.
void	setDropMode(DropMode dropMode)           Sets the drop mode for this component.
void	setEditingColumn(int aColumn)           Sets the editingColumn variable.
void	setEditingRow(int aRow)           Sets the editingRow variable.
void	setFillsViewportHeight(boolean fillsViewportHeight)           Sets whether or not this table is always made large enough to fill the height of an enclosing viewport.
void	setGridColor(Color gridColor)           Sets the color used to draw grid lines to gridColor and redisplays.
void	setIntercellSpacing(Dimension intercellSpacing)           Sets the rowMargin and the columnMargin -- the height and width of the space between cells -- to intercellSpacing.
void	setModel(TableModel dataModel)           Sets the data model for this table to newModel and registers with it for listener notifications from the new data model.
void	setPreferredScrollableViewportSize(Dimension size)           Sets the preferred size of the viewport for this table.
void	setRowHeight(int rowHeight)           Sets the height, in pixels, of all cells to rowHeight, revalidates, and repaints.
void	setRowHeight(int row, int rowHeight)           Sets the height for row to rowHeight, revalidates, and repaints.
void	setRowMargin(int rowMargin)           Sets the amount of empty space between cells in adjacent rows.
void	setRowSelectionAllowed(boolean rowSelectionAllowed)           Sets whether the rows in this model can be selected.
void	setRowSelectionInterval(int index0, int index1)           Selects the rows from index0 to index1, inclusive.
void	setRowSorter(RowSorter<? extends TableModel> sorter)           Sets the RowSorter.
void	setSelectionBackground(Color selectionBackground)           Sets the background color for selected cells.
void	setSelectionForeground(Color selectionForeground)           Sets the foreground color for selected cells.
void	setSelectionMode(int selectionMode)           Sets the table's selection mode to allow only single selections, a single contiguous interval, or multiple intervals.
void	setSelectionModel(ListSelectionModel newModel)           Sets the row selection model for this table to newModel and registers for listener notifications from the new selection model.
void	setShowGrid(boolean showGrid)           Sets whether the table draws grid lines around cells.
void	setShowHorizontalLines(boolean showHorizontalLines)           Sets whether the table draws horizontal lines between cells.
void	setShowVerticalLines(boolean showVerticalLines)           Sets whether the table draws vertical lines between cells.
void	setSurrendersFocusOnKeystroke(boolean surrendersFocusOnKeystroke)           Sets whether editors in this JTable get the keyboard focus when an editor is activated as a result of the JTable forwarding keyboard events for a cell.
void	setTableHeader(JTableHeader tableHeader)           Sets the tableHeader working with this JTable to newHeader.
void	setUI(TableUI ui)           Sets the L&F object that renders this component and repaints.
void	setUpdateSelectionOnSort(boolean update)           Specifies whether the selection should be updated after sorting.
void	setValueAt(Object aValue, int row, int column)           Sets the value for the cell in the table model at row and column.
void	sizeColumnsToFit(boolean lastColumnOnly)           Deprecated. As of Swing version 1.0.3, replaced by doLayout().
void	sizeColumnsToFit(int resizingColumn)           Obsolete as of Java 2 platform v1.4.
void	sorterChanged(RowSorterEvent e)           RowSorterListener notification that the RowSorter has changed in some way.
void	tableChanged(TableModelEvent e)           Invoked when this table's TableModel generates a TableModelEvent.
protected  void	unconfigureEnclosingScrollPane()           Reverses the effect of configureEnclosingScrollPane by replacing the columnHeaderView of the enclosing scroll pane with null.
void	updateUI()           Notification from the UIManager that the L&F has changed.
void	valueChanged(ListSelectionEvent e)           Invoked when the row selection changes -- repaints to show the new selection.

 

Methods inherited from class javax.swing.JComponent

addAncestorListener, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

 

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusBackward, transferFocusDownCycle, validate, validateTree

 

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPeer, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusUpCycle

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Field Detail

AUTO_RESIZE_OFF

public static final int AUTO_RESIZE_OFF

Do not adjust column widths automatically; use a scrollbar.

See Also:

Constant Field Values

---

AUTO_RESIZE_NEXT_COLUMN

public static final int AUTO_RESIZE_NEXT_COLUMN

When a column is adjusted in the UI, adjust the next column the opposite way.

See Also:

Constant Field Values

---

AUTO_RESIZE_SUBSEQUENT_COLUMNS

public static final int AUTO_RESIZE_SUBSEQUENT_COLUMNS

During UI adjustment, change subsequent columns to preserve the total width; this is the default behavior.

See Also:

Constant Field Values

---

AUTO_RESIZE_LAST_COLUMN

public static final int AUTO_RESIZE_LAST_COLUMN

During all resize operations, apply adjustments to the last column only.

See Also:

Constant Field Values

---

AUTO_RESIZE_ALL_COLUMNS

public static final int AUTO_RESIZE_ALL_COLUMNS

During all resize operations, proportionately resize all columns.

See Also:

Constant Field Values

---

dataModel

protected TableModel dataModel

The TableModel of the table.

---

columnModel

protected TableColumnModel columnModel

The TableColumnModel of the table.

---

selectionModel

protected ListSelectionModel selectionModel

The ListSelectionModel of the table, used to keep track of row selections.

---

tableHeader

protected JTableHeader tableHeader

The TableHeader working with the table.

---

rowHeight

protected int rowHeight

The height in pixels of each row in the table.

---

rowMargin

protected int rowMargin

The height in pixels of the margin between the cells in each row.

---

gridColor

protected Color gridColor

The color of the grid.

---

showHorizontalLines

protected boolean showHorizontalLines

The table draws horizontal lines between cells if showHorizontalLines is true.

---

showVerticalLines

protected boolean showVerticalLines

The table draws vertical lines between cells if showVerticalLines is true.

---

autoResizeMode

protected int autoResizeMode

Determines if the table automatically resizes the width of the table's columns to take up the entire width of the table, and how it does the resizing.

---

autoCreateColumnsFromModel

protected boolean autoCreateColumnsFromModel

The table will query the TableModel to build the default set of columns if this is true.

---

preferredViewportSize

protected Dimension preferredViewportSize

Used by the Scrollable interface to determine the initial visible area.

---

rowSelectionAllowed

protected boolean rowSelectionAllowed

True if row selection is allowed in this table.

---

cellSelectionEnabled

protected boolean cellSelectionEnabled

Obsolete as of Java 2 platform v1.3. Please use the rowSelectionAllowed property and the columnSelectionAllowed property of the columnModel instead. Or use the method getCellSelectionEnabled.

---

editorComp

protected transient Component editorComp

If editing, the Component that is handling the editing.

---

cellEditor

protected transient TableCellEditor cellEditor

The active cell editor object, that overwrites the screen real estate occupied by the current cell and allows the user to change its contents. null if the table isn't currently editing.

---

editingColumn

protected transient int editingColumn

Identifies the column of the cell being edited.

---

editingRow

protected transient int editingRow

Identifies the row of the cell being edited.

---

defaultRenderersByColumnClass

protected transient Hashtable defaultRenderersByColumnClass

A table of objects that display the contents of a cell, indexed by class as declared in getColumnClass in the TableModel interface.

---

defaultEditorsByColumnClass

protected transient Hashtable defaultEditorsByColumnClass

A table of objects that display and edit the contents of a cell, indexed by class as declared in getColumnClass in the TableModel interface.

---

selectionForeground

protected Color selectionForeground

The foreground color of selected cells.

---

selectionBackground

protected Color selectionBackground

The background color of selected cells.

Constructor Detail

JTable

public JTable()

Constructs a default JTable that is initialized with a default data model, a default column model, and a default selection model.

See Also:

createDefaultDataModel(), createDefaultColumnModel(), createDefaultSelectionModel()

---

JTable

public JTable(TableModel dm)

Constructs a JTable that is initialized with dm as the data model, a default column model, and a default selection model.

Parameters:

dm - the data model for the table

See Also:

createDefaultColumnModel(), createDefaultSelectionModel()

---

JTable

public JTable(TableModel dm,
              TableColumnModel cm)

Constructs a JTable that is initialized with dm as the data model, cm as the column model, and a default selection model.

Parameters:

dm - the data model for the table

cm - the column model for the table

See Also:

createDefaultSelectionModel()

---

JTable

public JTable(TableModel dm,
              TableColumnModel cm,
              ListSelectionModel sm)

Constructs a JTable that is initialized with dm as the data model, cm as the column model, and sm as the selection model. If any of the parameters are null this method will initialize the table with the corresponding default model. The autoCreateColumnsFromModel flag is set to false if cm is non-null, otherwise it is set to true and the column model is populated with suitable TableColumns for the columns in dm.

Parameters:

dm - the data model for the table

cm - the column model for the table

sm - the row selection model for the table

See Also:

createDefaultDataModel(), createDefaultColumnModel(), createDefaultSelectionModel()

---

JTable

public JTable(int numRows,
              int numColumns)

Constructs a JTable with numRows and numColumns of empty cells using DefaultTableModel. The columns will have names of the form "A", "B", "C", etc.

Parameters:

numRows - the number of rows the table holds

numColumns - the number of columns the table holds

See Also:

DefaultTableModel

---

JTable

public JTable(Vector rowData,
              Vector columnNames)

Constructs a JTable to display the values in the Vector of Vectors, rowData, with column names, columnNames. The Vectors contained in rowData should contain the values for that row. In other words, the value of the cell at row 1, column 5 can be obtained with the following code:

((Vector)rowData.elementAt(1)).elementAt(5);

Parameters:

rowData - the data for the new table

columnNames - names of each column

---

JTable

public JTable(Object[][] rowData,
              Object[] columnNames)

Constructs a JTable to display the values in the two dimensional array, rowData, with column names, columnNames. rowData is an array of rows, so the value of the cell at row 1, column 5 can be obtained with the following code:

 rowData[1][5]; 

All rows must be of the same length as columnNames.

Parameters:

rowData - the data for the new table

columnNames - names of each column

Method Detail

addNotify

public void addNotify()

Calls the configureEnclosingScrollPane method.

Overrides:

addNotify in class JComponent

See Also:

configureEnclosingScrollPane()

---

configureEnclosingScrollPane

protected void configureEnclosingScrollPane()

If this JTable is the viewportView of an enclosing JScrollPane (the usual situation), configure this ScrollPane by, amongst other things, installing the table's tableHeader as the columnHeaderView of the scroll pane. When a JTable is added to a JScrollPane in the usual way, using new JScrollPane(myTable), addNotify is called in the JTable (when the table is added to the viewport). JTable's addNotify method in turn calls this method, which is protected so that this default installation procedure can be overridden by a subclass.

See Also:

addNotify()

---

removeNotify

public void removeNotify()

Calls the unconfigureEnclosingScrollPane method.

Overrides:

removeNotify in class JComponent

See Also:

unconfigureEnclosingScrollPane()

---

unconfigureEnclosingScrollPane

protected void unconfigureEnclosingScrollPane()

Reverses the effect of configureEnclosingScrollPane by replacing the columnHeaderView of the enclosing scroll pane with null. JTable's removeNotify method calls this method, which is protected so that this default uninstallation procedure can be overridden by a subclass.

Since:

1.3

See Also:

removeNotify(), configureEnclosingScrollPane()

---

createScrollPaneForTable

@Deprecated
public static JScrollPane createScrollPaneForTable(JTable aTable)

Deprecated. As of Swing version 1.0.2, replaced by new JScrollPane(aTable).

Equivalent to new JScrollPane(aTable).

---

setTableHeader

public void setTableHeader(JTableHeader tableHeader)

Sets the tableHeader working with this JTable to newHeader. It is legal to have a null tableHeader.

Parameters:

tableHeader - new tableHeader

See Also:

getTableHeader()

---

getTableHeader

public JTableHeader getTableHeader()

Returns the tableHeader used by this JTable.

Returns:

the tableHeader used by this table

See Also:

setTableHeader(javax.swing.table.JTableHeader)

---

setRowHeight

public void setRowHeight(int rowHeight)

Sets the height, in pixels, of all cells to rowHeight, revalidates, and repaints. The height of the cells will be equal to the row height minus the row margin.

Parameters:

rowHeight - new row height

Throws:

IllegalArgumentException - if rowHeight is less than 1

See Also:

getRowHeight()

---

getRowHeight

public int getRowHeight()

Returns the height of a table row, in pixels. The default row height is 16.0.

Returns:

the height in pixels of a table row

See Also:

setRowHeight(int)

---

setRowHeight

public void setRowHeight(int row,
                         int rowHeight)

Sets the height for row to rowHeight, revalidates, and repaints. The height of the cells in this row will be equal to the row height minus the row margin.

Parameters:

row - the row whose height is being changed

rowHeight - new row height, in pixels

Throws:

IllegalArgumentException - if rowHeight is less than 1

Since:

1.3

---

getRowHeight

public int getRowHeight(int row)

Returns the height, in pixels, of the cells in row.

Parameters:

row - the row whose height is to be returned

Returns:

the height, in pixels, of the cells in the row

Since:

1.3

---

setRowMargin

public void setRowMargin(int rowMargin)

Sets the amount of empty space between cells in adjacent rows.

Parameters:

rowMargin - the number of pixels between cells in a row

See Also:

getRowMargin()

---

getRowMargin

public int getRowMargin()

Gets the amount of empty space, in pixels, between cells. Equivalent to: getIntercellSpacing().height.

Returns:

the number of pixels between cells in a row

See Also:

setRowMargin(int)

---

setIntercellSpacing

public void setIntercellSpacing(Dimension intercellSpacing)

Sets the rowMargin and the columnMargin -- the height and width of the space between cells -- to intercellSpacing.

Parameters:

intercellSpacing - a Dimension specifying the new width and height between cells

See Also:

getIntercellSpacing()

---

getIntercellSpacing

public Dimension getIntercellSpacing()

Returns the horizontal and vertical space between cells. The default spacing is (1, 1), which provides room to draw the grid.

Returns:

the horizontal and vertical spacing between cells

See Also:

setIntercellSpacing(java.awt.Dimension)

---

setGridColor

public void setGridColor(Color gridColor)

Sets the color used to draw grid lines to gridColor and redisplays. The default color is look and feel dependent.

Parameters:

gridColor - the new color of the grid lines

Throws:

IllegalArgumentException - if gridColor is null

See Also:

getGridColor()

---

getGridColor

public Color getGridColor()

Returns the color used to draw grid lines. The default color is look and feel dependent.

Returns:

the color used to draw grid lines

See Also:

setGridColor(java.awt.Color)

---

setShowGrid

public void setShowGrid(boolean showGrid)

Sets whether the table draws grid lines around cells. If showGrid is true it does; if it is false it doesn't. There is no getShowGrid method as this state is held in two variables -- showHorizontalLines and showVerticalLines -- each of which can be queried independently.

Parameters:

showGrid - true if table view should draw grid lines

See Also:

setShowVerticalLines(boolean), setShowHorizontalLines(boolean)

---

setShowHorizontalLines

public void setShowHorizontalLines(boolean showHorizontalLines)

Sets whether the table draws horizontal lines between cells. If showHorizontalLines is true it does; if it is false it doesn't.

Parameters:

showHorizontalLines - true if table view should draw horizontal lines

See Also:

getShowHorizontalLines(), setShowGrid(boolean), setShowVerticalLines(boolean)

---

setShowVerticalLines

public void setShowVerticalLines(boolean showVerticalLines)

Sets whether the table draws vertical lines between cells. If showVerticalLines is true it does; if it is false it doesn't.

Parameters:

showVerticalLines - true if table view should draw vertical lines

See Also:

getShowVerticalLines(), setShowGrid(boolean), setShowHorizontalLines(boolean)

---

getShowHorizontalLines

public boolean getShowHorizontalLines()

Returns true if the table draws horizontal lines between cells, false if it doesn't. The default is true.

Returns:

true if the table draws horizontal lines between cells, false if it doesn't

See Also:

setShowHorizontalLines(boolean)

---

getShowVerticalLines

public boolean getShowVerticalLines()

Returns true if the table draws vertical lines between cells, false if it doesn't. The default is true.

Returns:

true if the table draws vertical lines between cells, false if it doesn't

See Also:

setShowVerticalLines(boolean)

---

setAutoResizeMode

public void setAutoResizeMode(int mode)

Sets the table's auto resize mode when the table is resized.

Parameters:

mode - One of 5 legal values: AUTO_RESIZE_OFF, AUTO_RESIZE_NEXT_COLUMN, AUTO_RESIZE_SUBSEQUENT_COLUMNS, AUTO_RESIZE_LAST_COLUMN, AUTO_RESIZE_ALL_COLUMNS

See Also:

getAutoResizeMode(), doLayout()

---

getAutoResizeMode

public int getAutoResizeMode()

Returns the auto resize mode of the table. The default mode is AUTO_RESIZE_SUBSEQUENT_COLUMNS.

Returns:

the autoResizeMode of the table

See Also:

setAutoResizeMode(int), doLayout()

---

setAutoCreateColumnsFromModel

public void setAutoCreateColumnsFromModel(boolean autoCreateColumnsFromModel)

Sets this table's autoCreateColumnsFromModel flag. This method calls createDefaultColumnsFromModel if autoCreateColumnsFromModel changes from false to true.

Parameters:

autoCreateColumnsFromModel - true if JTable should automatically create columns

See Also:

getAutoCreateColumnsFromModel(), createDefaultColumnsFromModel()

---

getAutoCreateColumnsFromModel

public boolean getAutoCreateColumnsFromModel()

Determines whether the table will create default columns from the model. If true, setModel will clear any existing columns and create new columns from the new model. Also, if the event in the tableChanged notification specifies that the entire table changed, then the columns will be rebuilt. The default is true.

Returns:

the autoCreateColumnsFromModel of the table

See Also:

setAutoCreateColumnsFromModel(boolean), createDefaultColumnsFromModel()

---

createDefaultColumnsFromModel

public void createDefaultColumnsFromModel()

Creates default columns for the table from the data model using the getColumnCount method defined in the TableModel interface.

Clears any existing columns before creating the new columns based on information from the model.

See Also:

getAutoCreateColumnsFromModel()

---

setDefaultRenderer

public void setDefaultRenderer(Class<?> columnClass,
                               TableCellRenderer renderer)

Sets a default cell renderer to be used if no renderer has been set in a TableColumn. If renderer is null, removes the default renderer for this column class.

Parameters:

columnClass - set the default cell renderer for this columnClass

renderer - default cell renderer to be used for this columnClass

See Also:

getDefaultRenderer(java.lang.Class), setDefaultEditor(java.lang.Class, javax.swing.table.TableCellEditor)

---

getDefaultRenderer

public TableCellRenderer getDefaultRenderer(Class<?> columnClass)

Returns the cell renderer to be used when no renderer has been set in a TableColumn. During the rendering of cells the renderer is fetched from a Hashtable of entries according to the class of the cells in the column. If there is no entry for this columnClass the method returns the entry for the most specific superclass. The JTable installs entries for Object, Number, and Boolean, all of which can be modified or replaced.

Parameters:

columnClass - return the default cell renderer for this columnClass

Returns:

the renderer for this columnClass

See Also:

setDefaultRenderer(java.lang.Class, javax.swing.table.TableCellRenderer), getColumnClass(int)

---

setDefaultEditor

public void setDefaultEditor(Class<?> columnClass,
                             TableCellEditor editor)

Sets a default cell editor to be used if no editor has been set in a TableColumn. If no editing is required in a table, or a particular column in a table, uses the isCellEditable method in the TableModel interface to ensure that this JTable will not start an editor in these columns. If editor is null, removes the default editor for this column class.

Parameters:

columnClass - set the default cell editor for this columnClass

editor - default cell editor to be used for this columnClass

See Also:

TableModel.isCellEditable(int, int), getDefaultEditor(java.lang.Class), setDefaultRenderer(java.lang.Class, javax.swing.table.TableCellRenderer)

---

getDefaultEditor

public TableCellEditor getDefaultEditor(Class<?> columnClass)

Returns the editor to be used when no editor has been set in a TableColumn. During the editing of cells the editor is fetched from a Hashtable of entries according to the class of the cells in the column. If there is no entry for this columnClass the method returns the entry for the most specific superclass. The JTable installs entries for Object, Number, and Boolean, all of which can be modified or replaced.

Parameters:

columnClass - return the default cell editor for this columnClass

Returns:

the default cell editor to be used for this columnClass

See Also:

setDefaultEditor(java.lang.Class, javax.swing.table.TableCellEditor), getColumnClass(int)

---

setDragEnabled

public void setDragEnabled(boolean b)

Turns on or off automatic drag handling. In order to enable automatic drag handling, this property should be set to true, and the table's TransferHandler needs to be non-null. The default value of the dragEnabled property is false.

The job of honoring this property, and recognizing a user drag gesture, lies with the look and feel implementation, and in particular, the table's TableUI. When automatic drag handling is enabled, most look and feels (including those that subclass BasicLookAndFeel) begin a drag and drop operation whenever the user presses the mouse button over an item (in single selection mode) or a selection (in other selection modes) and then moves the mouse a few pixels. Setting this property to true can therefore have a subtle effect on how selections behave.

If a look and feel is used that ignores this property, you can still begin a drag and drop operation by calling exportAsDrag on the table's TransferHandler.

Parameters:

b - whether or not to enable automatic drag handling

Throws:

HeadlessException - if b is true and GraphicsEnvironment.isHeadless() returns true

Since:

1.4

See Also:

GraphicsEnvironment.isHeadless(), getDragEnabled(), JComponent.setTransferHandler(javax.swing.TransferHandler), TransferHandler

---

getDragEnabled

public boolean getDragEnabled()

Returns whether or not automatic drag handling is enabled.

Returns:

the value of the dragEnabled property

Since:

1.4

See Also:

setDragEnabled(boolean)

---

setDropMode

public final void setDropMode(DropMode dropMode)

Sets the drop mode for this component. For backward compatibility, the default for this property is DropMode.USE_SELECTION. Usage of one of the other modes is recommended, however, for an improved user experience. DropMode.ON, for instance, offers similar behavior of showing items as selected, but does so without affecting the actual selection in the table.

JTable supports the following drop modes:

• DropMode.USE_SELECTION
• DropMode.ON
• DropMode.INSERT
• DropMode.INSERT_ROWS
• DropMode.INSERT_COLS
• DropMode.ON_OR_INSERT
• DropMode.ON_OR_INSERT_ROWS
• DropMode.ON_OR_INSERT_COLS

The drop mode is only meaningful if this component has a TransferHandler that accepts drops.

Parameters:

dropMode - the drop mode to use

Throws:

IllegalArgumentException - if the drop mode is unsupported or null

Since:

1.6

See Also:

getDropMode(), getDropLocation(), JComponent.setTransferHandler(javax.swing.TransferHandler), TransferHandler

---

getDropMode

public final DropMode getDropMode()

Returns the drop mode for this component.

Returns:

the drop mode for this component

Since:

1.6

See Also:

setDropMode(javax.swing.DropMode)

---

getDropLocation

public final JTable.DropLocation getDropLocation()

Returns the location that this component should visually indicate as the drop location during a DnD operation over the component, or null if no location is to currently be shown.

This method is not meant for querying the drop location from a TransferHandler, as the drop location is only set after the TransferHandler's canImport has returned and has allowed for the location to be shown.

When this property changes, a property change event with name "dropLocation" is fired by the component.

Returns:

the drop location

Since:

1.6

See Also:

setDropMode(javax.swing.DropMode), TransferHandler.canImport(TransferHandler.TransferSupport)

---

setAutoCreateRowSorter

public void setAutoCreateRowSorter(boolean autoCreateRowSorter)

Specifies whether a RowSorter should be created for the table whenever its model changes.

When setAutoCreateRowSorter(true) is invoked, a TableRowSorter is immediately created and installed on the table. While the autoCreateRowSorter property remains true, every time the model is changed, a new TableRowSorter is created and set as the table's row sorter.

Parameters:

autoCreateRowSorter - whether or not a RowSorter should be automatically created

Since:

1.6

See Also:

TableRowSorter

---

getAutoCreateRowSorter

public boolean getAutoCreateRowSorter()

Returns true if whenever the model changes, a new RowSorter should be created and installed as the table's sorter; otherwise, returns false.

Returns:

true if a RowSorter should be created when the model changes

Since:

1.6

---

setUpdateSelectionOnSort

public void setUpdateSelectionOnSort(boolean update)

Specifies whether the selection should be updated after sorting. If true, on sorting the selection is reset such that the same rows, in terms of the model, remain selected. The default is true.

Parameters:

update - whether or not to update the selection on sorting

Since:

1.6

---

getUpdateSelectionOnSort

public boolean getUpdateSelectionOnSort()

Returns true if the selection should be updated after sorting.

Returns:

whether to update the selection on a sort

Since:

1.6

---

setRowSorter

public void setRowSorter(RowSorter<? extends TableModel> sorter)

Sets the RowSorter. RowSorter is used to provide sorting and filtering to a JTable.

This method clears the selection and resets any variable row heights.

If the underlying model of the RowSorter differs from that of this JTable undefined behavior will result.

Parameters:

sorter - the RowSorter; null turns sorting off

Since:

1.6

See Also:

TableRowSorter

---

getRowSorter

public RowSorter<? extends TableModel> getRowSorter()

Returns the object responsible for sorting.

Returns:

the object responsible for sorting

Since:

1.6

---

setSelectionMode

public void setSelectionMode(int selectionMode)

Sets the table's selection mode to allow only single selections, a single contiguous interval, or multiple intervals.

Note: JTable provides all the methods for handling column and row selection. When setting states, such as setSelectionMode, it not only updates the mode for the row selection model but also sets similar values in the selection model of the columnModel. If you want to have the row and column selection models operating in different modes, set them both directly.

Both the row and column selection models for JTable default to using a DefaultListSelectionModel so that JTable works the same way as the JList. See the setSelectionMode method in JList for details about the modes.

See Also:

JList.setSelectionMode(int)

---

setRowSelectionAllowed

public void setRowSelectionAllowed(boolean rowSelectionAllowed)

Sets whether the rows in this model can be selected.

Parameters:

rowSelectionAllowed - true if this model will allow row selection

See Also:

getRowSelectionAllowed()

---

getRowSelectionAllowed

public boolean getRowSelectionAllowed()

Returns true if rows can be selected.

Returns:

true if rows can be selected, otherwise false

See Also:

setRowSelectionAllowed(boolean)

---

setColumnSelectionAllowed

public void setColumnSelectionAllowed(boolean columnSelectionAllowed)

Sets whether the columns in this model can be selected.

Parameters:

columnSelectionAllowed - true if this model will allow column selection

See Also:

getColumnSelectionAllowed()

---

getColumnSelectionAllowed

public boolean getColumnSelectionAllowed()

Returns true if columns can be selected.

Returns:

true if columns can be selected, otherwise false

See Also:

setColumnSelectionAllowed(boolean)

---

setCellSelectionEnabled

public void setCellSelectionEnabled(boolean cellSelectionEnabled)

Sets whether this table allows both a column selection and a row selection to exist simultaneously. When set, the table treats the intersection of the row and column selection models as the selected cells. Override isCellSelected to change this default behavior. This method is equivalent to setting both the rowSelectionAllowed property and columnSelectionAllowed property of the columnModel to the supplied value.

Parameters:

cellSelectionEnabled - true if simultaneous row and column selection is allowed

See Also:

getCellSelectionEnabled(), isCellSelected(int, int)

---

getCellSelectionEnabled

public boolean getCellSelectionEnabled()

Returns true if both row and column selection models are enabled. Equivalent to getRowSelectionAllowed() && getColumnSelectionAllowed().

Returns:

true if both row and column selection models are enabled

See Also:

setCellSelectionEnabled(boolean)

---

selectAll

public void selectAll()

Selects all rows, columns, and cells in the table.

---

clearSelection

public void clearSelection()

Deselects all selected columns and rows.

---

setRowSelectionInterval

public void setRowSelectionInterval(int index0,
                                    int index1)

Selects the rows from index0 to index1, inclusive.

Parameters:

index0 - one end of the interval

index1 - the other end of the interval

Throws:

IllegalArgumentException - if index0 or index1 lie outside [0, getRowCount()-1]

---

setColumnSelectionInterval

public void setColumnSelectionInterval(int index0,
                                       int index1)

Selects the columns from index0 to index1, inclusive.

Parameters:

index0 - one end of the interval

index1 - the other end of the interval

Throws:

IllegalArgumentException - if index0 or index1 lie outside [0, getColumnCount()-1]

---

addRowSelectionInterval

public void addRowSelectionInterval(int index0,
                                    int index1)

Adds the rows from index0 to index1, inclusive, to the current selection.

Parameters:

index0 - one end of the interval

index1 - the other end of the interval

Throws:

IllegalArgumentException - if index0 or index1 lie outside [0, getRowCount()-1]

---

addColumnSelectionInterval

public void addColumnSelectionInterval(int index0,
                                       int index1)

Adds the columns from index0 to index1, inclusive, to the current selection.

Parameters:

index0 - one end of the interval

index1 - the other end of the interval

Throws:

IllegalArgumentException - if index0 or index1 lie outside [0, getColumnCount()-1]

---

removeRowSelectionInterval

public void removeRowSelectionInterval(int index0,
                                       int index1)

Deselects the rows from index0 to index1, inclusive.

Parameters:

index0 - one end of the interval

index1 - the other end of the interval

Throws:

IllegalArgumentException - if index0 or index1 lie outside [0, getRowCount()-1]

---

removeColumnSelectionInterval

public void removeColumnSelectionInterval(int index0,
                                          int index1)

Deselects the columns from index0 to index1, inclusive.

Parameters:

index0 - one end of the interval

index1 - the other end of the interval

Throws:

IllegalArgumentException - if index0 or index1 lie outside [0, getColumnCount()-1]

---

getSelectedRow

public int getSelectedRow()

Returns the index of the first selected row, -1 if no row is selected.

Returns:

the index of the first selected row

---

getSelectedColumn

public int getSelectedColumn()

Returns the index of the first selected column, -1 if no column is selected.

Returns:

the index of the first selected column

---

getSelectedRows

public int[] getSelectedRows()

Returns the indices of all selected rows.

Returns:

an array of integers containing the indices of all selected rows, or an empty array if no row is selected

See Also:

getSelectedRow()

---

getSelectedColumns

public int[] getSelectedColumns()

Returns the indices of all selected columns.

Returns:

an array of integers containing the indices of all selected columns, or an empty array if no column is selected

See Also:

getSelectedColumn()

---

getSelectedRowCount

public int getSelectedRowCount()

Returns the number of selected rows.

Returns:

the number of selected rows, 0 if no rows are selected

---

getSelectedColumnCount

public int getSelectedColumnCount()

Returns the number of selected columns.

Returns:

the number of selected columns, 0 if no columns are selected

---

isRowSelected

public boolean isRowSelected(int row)

Returns true if the specified index is in the valid range of rows, and the row at that index is selected.

Returns:

true if row is a valid index and the row at that index is selected (where 0 is the first row)

---

isColumnSelected

public boolean isColumnSelected(int column)

Returns true if the specified index is in the valid range of columns, and the column at that index is selected.

Parameters:

column - the column in the column model

Returns:

true if column is a valid index and the column at that index is selected (where 0 is the first column)

---

isCellSelected

public boolean isCellSelected(int row,
                              int column)

Returns true if the specified indices are in the valid range of rows and columns and the cell at the specified position is selected.

Parameters:

row - the row being queried

column - the column being queried

Returns:

true if row and column are valid indices and the cell at index (row, column) is selected, where the first row and first column are at index 0

---

changeSelection

public void changeSelection(int rowIndex,
                            int columnIndex,
                            boolean toggle,
                            boolean extend)

Updates the selection models of the table, depending on the state of the two flags: toggle and extend. Most changes to the selection that are the result of keyboard or mouse events received by the UI are channeled through this method so that the behavior may be overridden by a subclass. Some UIs may need more functionality than this method provides, such as when manipulating the lead for discontiguous selection, and may not call into this method for some selection changes.

This implementation uses the following conventions:

• toggle: false, extend: false. Clear the previous selection and ensure the new cell is selected.
• toggle: false, extend: true. Extend the previous selection from the anchor to the specified cell, clearing all other selections.
• toggle: true, extend: false. If the specified cell is selected, deselect it. If it is not selected, select it.
• toggle: true, extend: true. Apply the selection state of the anchor to all cells between it and the specified cell.

Parameters:

rowIndex - affects the selection at row

columnIndex - affects the selection at column

toggle - see description above

extend - if true, extend the current selection

Since:

1.3

---

getSelectionForeground

public Color getSelectionForeground()

Returns the foreground color for selected cells.

Returns:

the Color object for the foreground property

See Also:

setSelectionForeground(java.awt.Color), setSelectionBackground(java.awt.Color)

---

setSelectionForeground

public void setSelectionForeground(Color selectionForeground)

Sets the foreground color for selected cells. Cell renderers can use this color to render text and graphics for selected cells.

The default value of this property is defined by the look and feel implementation.

This is a JavaBeans bound property.

Parameters:

selectionForeground - the Color to use in the foreground for selected list items

See Also:

getSelectionForeground(), setSelectionBackground(java.awt.Color), JComponent.setForeground(java.awt.Color), JComponent.setBackground(java.awt.Color), JComponent.setFont(java.awt.Font)

---

getSelectionBackground

public Color getSelectionBackground()

Returns the background color for selected cells.

Returns:

the Color used for the background of selected list items

See Also:

setSelectionBackground(java.awt.Color), setSelectionForeground(java.awt.Color)

---

setSelectionBackground

public void setSelectionBackground(Color selectionBackground)

Sets the background color for selected cells. Cell renderers can use this color to the fill selected cells.

The default value of this property is defined by the look and feel implementation.

This is a JavaBeans bound property.

Parameters:

selectionBackground - the Color to use for the background of selected cells

See Also:

getSelectionBackground(), setSelectionForeground(java.awt.Color), JComponent.setForeground(java.awt.Color), JComponent.setBackground(java.awt.Color), JComponent.setFont(java.awt.Font)

---

getColumn

public TableColumn getColumn(Object identifier)

Returns the TableColumn object for the column in the table whose identifier is equal to identifier, when compared using equals.

Parameters:

identifier - the identifier object

Returns:

the TableColumn object that matches the identifier

Throws:

IllegalArgumentException - if identifier is null or no TableColumn has this identifier

---

convertColumnIndexToModel

public int convertColumnIndexToModel(int viewColumnIndex)

Maps the index of the column in the view at viewColumnIndex to the index of the column in the table model. Returns the index of the corresponding column in the model. If viewColumnIndex is less than zero, returns viewColumnIndex.

Parameters:

viewColumnIndex - the index of the column in the view

Returns:

the index of the corresponding column in the model

See Also:

convertColumnIndexToView(int)

---

convertColumnIndexToView

public int convertColumnIndexToView(int modelColumnIndex)

Maps the index of the column in the table model at modelColumnIndex to the index of the column in the view. Returns the index of the corresponding column in the view; returns -1 if this column is not being displayed. If modelColumnIndex is less than zero, returns modelColumnIndex.

Parameters:

modelColumnIndex - the index of the column in the model

Returns:

the index of the corresponding column in the view

See Also:

convertColumnIndexToModel(int)

---

convertRowIndexToView

public int convertRowIndexToView(int modelRowIndex)

Maps the index of the row in terms of the TableModel to the view. If the contents of the model are not sorted the model and view indices are the same.

Parameters:

modelRowIndex - the index of the row in terms of the model

Returns:

the index of the corresponding row in the view, or -1 if the row isn't visible

Throws:

IndexOutOfBoundsException - if sorting is enabled and passed an index outside the number of rows of the TableModel

Since:

1.6

See Also:

TableRowSorter

---

convertRowIndexToModel

public int convertRowIndexToModel(int viewRowIndex)

Maps the index of the row in terms of the view to the underlying TableModel. If the contents of the model are not sorted the model and view indices are the same.

Parameters:

viewRowIndex - the index of the row in the view

Returns:

the index of the corresponding row in the model

Throws:

IndexOutOfBoundsException - if sorting is enabled and passed an index outside the range of the JTable as determined by the method getRowCount

Since:

1.6

See Also:

TableRowSorter, getRowCount()

---

getRowCount

public int getRowCount()

Returns the number of rows that can be shown in the JTable, given unlimited space. If a RowSorter with a filter has been specified, the number of rows returned may differ from that of the underlying TableModel.

Returns:

the number of rows shown in the JTable

See Also:

getColumnCount()

---

getColumnCount

public int getColumnCount()

Returns the number of columns in the column model. Note that this may be different from the number of columns in the table model.

Returns:

the number of columns in the table

See Also:

getRowCount(), removeColumn(javax.swing.table.TableColumn)

---

getColumnName

public String getColumnName(int column)

Returns the name of the column appearing in the view at column position column.

Parameters:

column - the column in the view being queried

Returns:

the name of the column at position column in the view where the first column is column 0

---

getColumnClass

public Class<?> getColumnClass(int column)

Returns the type of the column appearing in the view at column position column.

Parameters:

column - the column in the view being queried

Returns:

the type of the column at position column in the view where the first column is column 0

---

getValueAt

public Object getValueAt(int row,
                         int column)

Returns the cell value at row and column.

Note: The column is specified in the table view's display order, and not in the TableModel's column order. This is an important distinction because as the user rearranges the columns in the table, the column at a given index in the view will change. Meanwhile the user's actions never affect the model's column ordering.

Parameters:

row - the row whose value is to be queried

column - the column whose value is to be queried

Returns:

the Object at the specified cell

---

setValueAt

public void setValueAt(Object aValue,
                       int row,
                       int column)

Sets the value for the cell in the table model at row and column.

Note: The column is specified in the table view's display order, and not in the TableModel's column order. This is an important distinction because as the user rearranges the columns in the table, the column at a given index in the view will change. Meanwhile the user's actions never affect the model's column ordering. aValue is the new value.

Parameters:

aValue - the new value

row - the row of the cell to be changed

column - the column of the cell to be changed

See Also:

getValueAt(int, int)

---

isCellEditable

public boolean isCellEditable(int row,
                              int column)

Returns true if the cell at row and column is editable. Otherwise, invoking setValueAt on the cell will have no effect.

Note: The column is specified in the table view's display order, and not in the TableModel's column order. This is an important distinction because as the user rearranges the columns in the table, the column at a given index in the view will change. Meanwhile the user's actions never affect the model's column ordering.

Parameters:

row - the row whose value is to be queried

column - the column whose value is to be queried

Returns:

true if the cell is editable

See Also:

setValueAt(java.lang.Object, int, int)

---

addColumn

public void addColumn(TableColumn aColumn)

Appends aColumn to the end of the array of columns held by this JTable's column model. If the column name of aColumn is null, sets the column name of aColumn to the name returned by getModel().getColumnName().

To add a column to this JTable to display the modelColumn'th column of data in the model with a given width, cellRenderer, and cellEditor you can use:

      addColumn(new TableColumn(modelColumn, width, cellRenderer, cellEditor));

  

[Any of the TableColumn constructors can be used instead of this one.] The model column number is stored inside the TableColumn and is used during rendering and editing to locate the appropriates data values in the model. The model column number does not change when columns are reordered in the view.

Parameters:

aColumn - the TableColumn to be added

See Also:

removeColumn(javax.swing.table.TableColumn)

---

removeColumn

public void removeColumn(TableColumn aColumn)

Removes aColumn from this JTable's array of columns. Note: this method does not remove the column of data from the model; it just removes the TableColumn that was responsible for displaying it.

Parameters:

aColumn - the TableColumn to be removed

See Also:

addColumn(javax.swing.table.TableColumn)

---

moveColumn

public void moveColumn(int column,
                       int targetColumn)

Moves the column column to the position currently occupied by the column targetColumn in the view. The old column at targetColumn is shifted left or right to make room.

Parameters:

column - the index of column to be moved

targetColumn - the new index of the column

---

columnAtPoint

public int columnAtPoint(Point point)

Returns the index of the column that point lies in, or -1 if the result is not in the range [0, getColumnCount()-1].

Parameters:

point - the location of interest

Returns:

the index of the column that point lies in, or -1 if the result is not in the range [0, getColumnCount()-1]

See Also:

rowAtPoint(java.awt.Point)

---

rowAtPoint

public int rowAtPoint(Point point)

Returns the index of the row that point lies in, or -1 if the result is not in the range [0, getRowCount()-1].

Parameters:

point - the location of interest

Returns:

the index of the row that point lies in, or -1 if the result is not in the range [0, getRowCount()-1]

See Also:

columnAtPoint(java.awt.Point)

---

getCellRect

public Rectangle getCellRect(int row,
                             int column,
                             boolean includeSpacing)

Returns a rectangle for the cell that lies at the intersection of row and column. If includeSpacing is true then the value returned has the full height and width of the row and column specified. If it is false, the returned rectangle is inset by the intercell spacing to return the true bounds of the rendering or editing component as it will be set during rendering.

If the column index is valid but the row index is less than zero the method returns a rectangle with the y and height values set appropriately and the x and width values both set to zero. In general, when either the row or column indices indicate a cell outside the appropriate range, the method returns a rectangle depicting the closest edge of the closest cell that is within the table's range. When both row and column indices are out of range the returned rectangle covers the closest point of the closest cell.

In all cases, calculations that use this method to calculate results along one axis will not fail because of anomalies in calculations along the other axis. When the cell is not valid the includeSpacing parameter is ignored.

Parameters:

row - the row index where the desired cell is located

column - the column index where the desired cell is located in the display; this is not necessarily the same as the column index in the data model for the table; the convertColumnIndexToView(int) method may be used to convert a data model column index to a display column index

includeSpacing - if false, return the true cell bounds - computed by subtracting the intercell spacing from the height and widths of the column and row models

Returns:

the rectangle containing the cell at location row,column

See Also:

getIntercellSpacing()

---

doLayout

public void doLayout()

Causes this table to lay out its rows and columns. Overridden so that columns can be resized to accomodate a change in the size of a containing parent. Resizes one or more of the columns in the table so that the total width of all of this JTable's columns is equal to the width of the table.

Before the layout begins the method gets the resizingColumn of the tableHeader. When the method is called as a result of the resizing of an enclosing window, the resizingColumn is null. This means that resizing has taken place "outside" the JTable and the change - or "delta" - should be distributed to all of the columns regardless of this JTable's automatic resize mode.

If the resizingColumn is not null, it is one of the columns in the table that has changed size rather than the table itself. In this case the auto-resize modes govern the way the extra (or deficit) space is distributed amongst the available columns.

The modes are:

• AUTO_RESIZE_OFF: Don't automatically adjust the column's widths at all. Use a horizontal scrollbar to accomodate the columns when their sum exceeds the width of the Viewport. If the JTable is not enclosed in a JScrollPane this may leave parts of the table invisible.
• AUTO_RESIZE_NEXT_COLUMN: Use just the column after the resizing column. This results in the "boundary" or divider between adjacent cells being independently adjustable.
• AUTO_RESIZE_SUBSEQUENT_COLUMNS: Use all columns after the one being adjusted to absorb the changes. This is the default behavior.
• AUTO_RESIZE_LAST_COLUMN: Automatically adjust the size of the last column only. If the bounds of the last column prevent the desired size from being allocated, set the width of the last column to the appropriate limit and make no further adjustments.
• AUTO_RESIZE_ALL_COLUMNS: Spread the delta amongst all the columns in the JTable, including the one that is being adjusted.

Note: When a JTable makes adjustments to the widths of the columns it respects their minimum and maximum values absolutely. It is therefore possible that, even after this method is called, the total width of the columns is still not equal to the width of the table. When this happens the JTable does not put itself in AUTO_RESIZE_OFF mode to bring up a scroll bar, or break other commitments of its current auto-resize mode -- instead it allows its bounds to be set larger (or smaller) than the total of the column minimum or maximum, meaning, either that there will not be enough room to display all of the columns, or that the columns will not fill the JTable's bounds. These respectively, result in the clipping of some columns or an area being painted in the JTable's background color during painting.

The mechanism for distributing the delta amongst the available columns is provided in a private method in the JTable class:

   adjustSizes(long targetSize, final Resizable3 r, boolean inverse)
 

an explanation of which is provided in the following section. Resizable3 is a private interface that allows any data structure containing a collection of elements with a size, preferred size, maximum size and minimum size to have its elements manipulated by the algorithm.

Distributing the delta

Overview

Call "DELTA" the difference between the target size and the sum of the preferred sizes of the elements in r. The individual sizes are calculated by taking the original preferred sizes and adding a share of the DELTA - that share being based on how far each preferred size is from its limiting bound (minimum or maximum).

Definition

Call the individual constraints min[i], max[i], and pref[i].

Call their respective sums: MIN, MAX, and PREF.

Each new size will be calculated using:

          size[i] = pref[i] + delta[i]
 

where each individual delta[i] is calculated according to:

If (DELTA < 0) we are in shrink mode where:

                        DELTA
          delta[i] = ------------ * (pref[i] - min[i])
                     (PREF - MIN)
 

If (DELTA > 0) we are in expand mode where:

                        DELTA
          delta[i] = ------------ * (max[i] - pref[i])
                      (MAX - PREF)
 

The overall effect is that the total size moves that same percentage, k, towards the total minimum or maximum and that percentage guarantees accomodation of the required space, DELTA.

Details

Naive evaluation of the formulae presented here would be subject to the aggregated rounding errors caused by doing this operation in finite precision (using ints). To deal with this, the multiplying factor above, is constantly recalculated and this takes account of the rounding errors in the previous iterations. The result is an algorithm that produces a set of integers whose values exactly sum to the supplied targetSize, and does so by spreading the rounding errors evenly over the given elements.

When the MAX and MIN bounds are hit

When targetSize is outside the [MIN, MAX] range, the algorithm sets all sizes to their appropriate limiting value (maximum or minimum).

Overrides:

doLayout in class Container

See Also:

LayoutManager.layoutContainer(java.awt.Container), Container.setLayout(java.awt.LayoutManager), Container.validate()

---

sizeColumnsToFit

@Deprecated
public void sizeColumnsToFit(boolean lastColumnOnly)

Deprecated. As of Swing version 1.0.3, replaced by doLayout().

Sizes the table columns to fit the available space.

See Also:

doLayout()

---

sizeColumnsToFit

public void sizeColumnsToFit(int resizingColumn)

Obsolete as of Java 2 platform v1.4. Please use the doLayout() method instead.

Parameters:

resizingColumn - the column whose resizing made this adjustment necessary or -1 if there is no such column

See Also:

doLayout()

---

getToolTipText

public String getToolTipText(MouseEvent event)

Overrides JComponent's getToolTipText method in order to allow the renderer's tips to be used if it has text set.

Note: For JTable to properly display tooltips of its renderers JTable must be a registered component with the ToolTipManager. This is done automatically in initializeLocalVars, but if at a later point JTable is told setToolTipText(null) it will unregister the table component, and no tips from renderers will display anymore.

Overrides:

getToolTipText in class JComponent

See Also:

JComponent.getToolTipText()

---

setSurrendersFocusOnKeystroke

public void setSurrendersFocusOnKeystroke(boolean surrendersFocusOnKeystroke)

Sets whether editors in this JTable get the keyboard focus when an editor is activated as a result of the JTable forwarding keyboard events for a cell. By default, this property is false, and the JTable retains the focus unless the cell is clicked.

Parameters:

surrendersFocusOnKeystroke - true if the editor should get the focus when keystrokes cause the editor to be activated

Since:

1.4

See Also:

getSurrendersFocusOnKeystroke()

---

getSurrendersFocusOnKeystroke

public boolean getSurrendersFocusOnKeystroke()

Returns true if the editor should get the focus when keystrokes cause the editor to be activated

Returns:

true if the editor should get the focus when keystrokes cause the editor to be activated

Since:

1.4

See Also:

setSurrendersFocusOnKeystroke(boolean)

---

editCellAt

public boolean editCellAt(int row,
                          int column)

Programmatically starts editing the cell at row and column, if those indices are in the valid range, and the cell at those indices is editable. Note that this is a convenience method for editCellAt(int, int, null).

Parameters:

row - the row to be edited

column - the column to be edited

Returns:

false if for any reason the cell cannot be edited, or if the indices are invalid

---

editCellAt

public boolean editCellAt(int row,
                          int column,
                          EventObject e)

Programmatically starts editing the cell at row and column, if those indices are in the valid range, and the cell at those indices is editable. To prevent the JTable from editing a particular table, column or cell value, return false from the isCellEditable method in the TableModel interface.

Parameters:

row - the row to be edited

column - the column to be edited

e - event to pass into shouldSelectCell; note that as of Java 2 platform v1.2, the call to shouldSelectCell is no longer made

Returns:

false if for any reason the cell cannot be edited, or if the indices are invalid

---

isEditing

public boolean isEditing()

Returns true if a cell is being edited.

Returns:

true if the table is editing a cell

See Also:

editingColumn, editingRow

---

getEditorComponent

public Component getEditorComponent()

Returns the component that is handling the editing session. If nothing is being edited, returns null.

Returns:

Component handling editing session

---

getEditingColumn

public int getEditingColumn()

Returns the index of the column that contains the cell currently being edited. If nothing is being edited, returns -1.

Returns:

the index of the column that contains the cell currently being edited; returns -1 if nothing being edited

See Also:

editingRow

---

getEditingRow

public int getEditingRow()

Returns the index of the row that contains the cell currently being edited. If nothing is being edited, returns -1.

Returns:

the index of the row that contains the cell currently being edited; returns -1 if nothing being edited

See Also:

editingColumn

---

getUI

public TableUI getUI()

Returns the L&F object that renders this component.

Returns:

the TableUI object that renders this component

---

setUI

public void setUI(TableUI ui)

Sets the L&F object that renders this component and repaints.

Parameters:

ui - the TableUI L&F object

See Also:

UIDefaults.getUI(javax.swing.JComponent)

---

updateUI

public void updateUI()

Notification from the UIManager that the L&F has changed. Replaces the current UI object with the latest version from the UIManager.

Overrides:

updateUI in class JComponent

See Also:

JComponent.updateUI()

---

getUIClassID

public String getUIClassID()

Returns the suffix used to construct the name of the L&F class used to render this component.

Overrides:

getUIClassID in class JComponent

Returns:

the string "TableUI"

See Also:

JComponent.getUIClassID(), UIDefaults.getUI(javax.swing.JComponent)

---

setModel

public void setModel(TableModel dataModel)

Sets the data model for this table to newModel and registers with it for listener notifications from the new data model.

Parameters:

dataModel - the new data source for this table

Throws:

IllegalArgumentException - if newModel is null

See Also:

getModel()

---

getModel

public TableModel getModel()

Returns the TableModel that provides the data displayed by this JTable.

Returns:

the TableModel that provides the data displayed by this JTable

See Also:

setModel(javax.swing.table.TableModel)

---

setColumnModel

public void setColumnModel(TableColumnModel columnModel)

Sets the column model for this table to newModel and registers for listener notifications from the new column model. Also sets the column model of the JTableHeader to columnModel.

Parameters:

columnModel - the new data source for this table

Throws:

IllegalArgumentException - if columnModel is null

See Also:

getColumnModel()

---

getColumnModel

public TableColumnModel getColumnModel()

Returns the TableColumnModel that contains all column information of this table.

Returns:

the object that provides the column state of the table

See Also:

setColumnModel(javax.swing.table.TableColumnModel)

---

setSelectionModel

public void setSelectionModel(ListSelectionModel newModel)

Sets the row selection model for this table to newModel and registers for listener notifications from the new selection model.

Parameters:

newModel - the new selection model

Throws:

IllegalArgumentException - if newModel is null

See Also:

getSelectionModel()

---

getSelectionModel

public ListSelectionModel getSelectionModel()

Returns the ListSelectionModel that is used to maintain row selection state.

Returns:

the object that provides row selection state, null if row selection is not allowed

See Also:

setSelectionModel(javax.swing.ListSelectionModel)

---

sorterChanged

public void sorterChanged(RowSorterEvent e)

RowSorterListener notification that the RowSorter has changed in some way.

Specified by:

sorterChanged in interface RowSorterListener

Parameters:

e - the RowSorterEvent describing the change

Throws:

NullPointerException - if e is null

Since:

1.6

---

tableChanged

public void tableChanged(TableModelEvent e)

Invoked when this table's TableModel generates a TableModelEvent. The TableModelEvent should be constructed in the coordinate system of the model; the appropriate mapping to the view coordinate system is performed by this JTable when it receives the event.

Application code will not use these methods explicitly, they are used internally by JTable.

Note that as of 1.3, this method clears the selection, if any.

Specified by:

tableChanged in interface TableModelListener

---

columnAdded

public void columnAdded(TableColumnModelEvent e)

Invoked when a column is added to the table column model.

Application code will not use these methods explicitly, they are used internally by JTable.

Specified by:

columnAdded in interface TableColumnModelListener

See Also:

TableColumnModelListener

---

columnRemoved

public void columnRemoved(TableColumnModelEvent e)

Invoked when a column is removed from the table column model.

Application code will not use these methods explicitly, they are used internally by JTable.

Specified by:

columnRemoved in interface TableColumnModelListener

See Also:

TableColumnModelListener

---

columnMoved

public void columnMoved(TableColumnModelEvent e)

Invoked when a column is repositioned. If a cell is being edited, then editing is stopped and the cell is redrawn.

Application code will not use these methods explicitly, they are used internally by JTable.

Specified by:

columnMoved in interface TableColumnModelListener

Parameters:

e - the event received

See Also:

TableColumnModelListener

---

columnMarginChanged

public void columnMarginChanged(ChangeEvent e)

Invoked when a column is moved due to a margin change. If a cell is being edited, then editing is stopped and the cell is redrawn.

Application code will not use these methods explicitly, they are used internally by JTable.

Specified by:

columnMarginChanged in interface TableColumnModelListener

Parameters:

e - the event received

See Also:

TableColumnModelListener

---

columnSelectionChanged

public void columnSelectionChanged(ListSelectionEvent e)

Invoked when the selection model of the TableColumnModel is changed.

Application code will not use these methods explicitly, they are used internally by JTable.

Specified by:

columnSelectionChanged in interface TableColumnModelListener

Parameters:

e - the event received

See Also:

TableColumnModelListener

---

valueChanged

public void valueChanged(ListSelectionEvent e)

Invoked when the row selection changes -- repaints to show the new selection.

Application code will not use these methods explicitly, they are used internally by JTable.

Specified by:

valueChanged in interface ListSelectionListener

Parameters:

e - the event received

See Also:

ListSelectionListener

---

editingStopped

public void editingStopped(ChangeEvent e)

Invoked when editing is finished. The changes are saved and the editor is discarded.

Application code will not use these methods explicitly, they are used internally by JTable.

Specified by:

editingStopped in interface CellEditorListener

Parameters:

e - the event received

See Also:

CellEditorListener

---

editingCanceled

public void editingCanceled(ChangeEvent e)

Invoked when editing is canceled. The editor object is discarded and the cell is rendered once again.

Application code will not use these methods explicitly, they are used internally by JTable.

Specified by:

editingCanceled in interface CellEditorListener

Parameters:

e - the event received

See Also:

CellEditorListener

---

setPreferredScrollableViewportSize

public void setPreferredScrollableViewportSize(Dimension size)

Sets the preferred size of the viewport for this table.

Parameters:

size - a Dimension object specifying the preferredSize of a JViewport whose view is this table

See Also:

Scrollable.getPreferredScrollableViewportSize()

---

getPreferredScrollableViewportSize

public Dimension getPreferredScrollableViewportSize()

Returns the preferred size of the viewport for this table.

Specified by:

getPreferredScrollableViewportSize in interface Scrollable

Returns:

a Dimension object containing the preferredSize of the JViewport which displays this table

See Also:

Scrollable.getPreferredScrollableViewportSize()

---

getScrollableUnitIncrement

public int getScrollableUnitIncrement(Rectangle visibleRect,
                                      int orientation,
                                      int direction)

Returns the scroll increment (in pixels) that completely exposes one new row or column (depending on the orientation).

This method is called each time the user requests a unit scroll.

Specified by:

getScrollableUnitIncrement in interface Scrollable

Parameters:

visibleRect - the view area visible within the viewport

orientation - either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL

direction - less than zero to scroll up/left, greater than zero for down/right

Returns:

the "unit" increment for scrolling in the specified direction

See Also:

Scrollable.getScrollableUnitIncrement(java.awt.Rectangle, int, int)

---

getScrollableBlockIncrement

public int getScrollableBlockIncrement(Rectangle visibleRect,
                                       int orientation,
                                       int direction)

Returns visibleRect.height or visibleRect.width, depending on this table's orientation. Note that as of Swing 1.1.1 (Java 2 v 1.2.2) the value returned will ensure that the viewport is cleanly aligned on a row boundary.

Specified by:

getScrollableBlockIncrement in interface Scrollable

Parameters:

visibleRect - The view area visible within the viewport

orientation - Either SwingConstants.VERTICAL or SwingConstants.HORIZONTAL.

direction - Less than zero to scroll up/left, greater than zero for down/right.

Returns:

visibleRect.height or visibleRect.width per the orientation

See Also:

Scrollable.getScrollableBlockIncrement(java.awt.Rectangle, int, int)

---

getScrollableTracksViewportWidth

public boolean getScrollableTracksViewportWidth()

Returns false if autoResizeMode is set to AUTO_RESIZE_OFF, which indicates that the width of the viewport does not determine the width of the table. Otherwise returns true.

Specified by:

getScrollableTracksViewportWidth in interface Scrollable

Returns:

false if autoResizeMode is set to AUTO_RESIZE_OFF, otherwise returns true

See Also:

Scrollable.getScrollableTracksViewportWidth()

---

getScrollableTracksViewportHeight

public boolean getScrollableTracksViewportHeight()

Returns false to indicate that the height of the viewport does not determine the height of the table, unless getFillsViewportHeight is true and the preferred height of the table is smaller than the viewport's height.

Specified by:

getScrollableTracksViewportHeight in interface Scrollable

Returns:

false unless getFillsViewportHeight is true and the table needs to be stretched to fill the viewport

See Also:

Scrollable.getScrollableTracksViewportHeight(), setFillsViewportHeight(boolean), getFillsViewportHeight()

---

setFillsViewportHeight

public void setFillsViewportHeight(boolean fillsViewportHeight)

Sets whether or not this table is always made large enough to fill the height of an enclosing viewport. If the preferred height of the table is smaller than the viewport, then the table will be stretched to fill the viewport. In other words, this ensures the table is never smaller than the viewport. The default for this property is false.

Parameters:

fillsViewportHeight - whether or not this table is always made large enough to fill the height of an enclosing viewport

Since:

1.6

See Also:

getFillsViewportHeight(), getScrollableTracksViewportHeight()

---

getFillsViewportHeight

public boolean getFillsViewportHeight()

Returns whether or not this table is always made large enough to fill the height of an enclosing viewport.

Returns:

whether or not this table is always made large enough to fill the height of an enclosing viewport

Since:

1.6

See Also:

setFillsViewportHeight(boolean)

---

processKeyBinding

protected boolean processKeyBinding(KeyStroke ks,
                                    KeyEvent e,
                                    int condition,
                                    boolean pressed)

Description copied from class: JComponent

Invoked to process the key bindings for ks as the result of the KeyEvent e. This obtains the appropriate InputMap, gets the binding, gets the action from the ActionMap, and then (if the action is found and the component is enabled) invokes notifyAction to notify the action.

Overrides:

processKeyBinding in class JComponent

Parameters:

ks - the KeyStroke queried

e - the KeyEvent

condition - one of the following values:

• JComponent.WHEN_FOCUSED
• JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT
• JComponent.WHEN_IN_FOCUSED_WINDOW

pressed - true if the key is pressed

Returns:

true if there was a binding to an action, and the action was enabled

---

createDefaultRenderers

protected void createDefaultRenderers()

Creates default cell renderers for objects, numbers, doubles, dates, booleans, and icons.

See Also:

DefaultTableCellRenderer

---

createDefaultEditors

protected void createDefaultEditors()

Creates default cell editors for objects, numbers, and boolean values.

See Also:

DefaultCellEditor

---

initializeLocalVars

protected void initializeLocalVars()

Initializes table properties to their default values.

---

createDefaultDataModel

protected TableModel createDefaultDataModel()

Returns the default table model object, which is a DefaultTableModel. A subclass can override this method to return a different table model object.

Returns:

the default table model object

See Also:

DefaultTableModel

---

createDefaultColumnModel

protected TableColumnModel createDefaultColumnModel()

Returns the default column model object, which is a DefaultTableColumnModel. A subclass can override this method to return a different column model object.

Returns:

the default column model object

See Also:

DefaultTableColumnModel

---

createDefaultSelectionModel

protected ListSelectionModel createDefaultSelectionModel()

Returns the default selection model object, which is a DefaultListSelectionModel. A subclass can override this method to return a different selection model object.

Returns:

the default selection model object

See Also:

DefaultListSelectionModel

---

createDefaultTableHeader

protected JTableHeader createDefaultTableHeader()

Returns the default table header object, which is a JTableHeader. A subclass can override this method to return a different table header object.

Returns:

the default table header object

See Also:

JTableHeader

---

resizeAndRepaint

protected void resizeAndRepaint()

Equivalent to revalidate followed by repaint.

---

getCellEditor

public TableCellEditor getCellEditor()

Returns the active cell editor, which is null if the table is not currently editing.

Returns:

the TableCellEditor that does the editing, or null if the table is not currently editing.

See Also:

cellEditor, getCellEditor(int, int)

---

setCellEditor

public void setCellEditor(TableCellEditor anEditor)

Sets the active cell editor.

Parameters:

anEditor - the active cell editor

See Also:

cellEditor

---

setEditingColumn

public void setEditingColumn(int aColumn)

Sets the editingColumn variable.

Parameters:

aColumn - the column of the cell to be edited

See Also:

editingColumn

---

setEditingRow

public void setEditingRow(int aRow)

Sets the editingRow variable.

Parameters:

aRow - the row of the cell to be edited

See Also:

editingRow

---

getCellRenderer

public TableCellRenderer getCellRenderer(int row,
                                         int column)

Returns an appropriate renderer for the cell specified by this row and column. If the TableColumn for this column has a non-null renderer, returns that. If not, finds the class of the data in this column (using getColumnClass) and returns the default renderer for this type of data.

Note: Throughout the table package, the internal implementations always use this method to provide renderers so that this default behavior can be safely overridden by a subclass.

Parameters:

row - the row of the cell to render, where 0 is the first row

column - the column of the cell to render, where 0 is the first column

Returns:

the assigned renderer; if null returns the default renderer for this type of object

See Also:

DefaultTableCellRenderer, TableColumn.setCellRenderer(javax.swing.table.TableCellRenderer), setDefaultRenderer(java.lang.Class, javax.swing.table.TableCellRenderer)

---

prepareRenderer

public Component prepareRenderer(TableCellRenderer renderer,
                                 int row,
                                 int column)

Prepares the renderer by querying the data model for the value and selection state of the cell at row, column. Returns the component (may be a Component or a JComponent) under the event location.

During a printing operation, this method will configure the renderer without indicating selection or focus, to prevent them from appearing in the printed output. To do other customizations based on whether or not the table is being printed, you can check the value of JComponent.isPaintingForPrint(), either here or within custom renderers.

Note: Throughout the table package, the internal implementations always use this method to prepare renderers so that this default behavior can be safely overridden by a subclass.

Parameters:

renderer - the TableCellRenderer to prepare

row - the row of the cell to render, where 0 is the first row

column - the column of the cell to render, where 0 is the first column

Returns:

the Component under the event location

---

getCellEditor

public TableCellEditor getCellEditor(int row,
                                     int column)

Returns an appropriate editor for the cell specified by row and column. If the TableColumn for this column has a non-null editor, returns that. If not, finds the class of the data in this column (using getColumnClass) and returns the default editor for this type of data.

Note: Throughout the table package, the internal implementations always use this method to provide editors so that this default behavior can be safely overridden by a subclass.

Parameters:

row - the row of the cell to edit, where 0 is the first row

column - the column of the cell to edit, where 0 is the first column

Returns:

the editor for this cell; if null return the default editor for this type of cell

See Also:

DefaultCellEditor

---

prepareEditor

public Component prepareEditor(TableCellEditor editor,
                               int row,
                               int column)

Prepares the editor by querying the data model for the value and selection state of the cell at row, column.

Note: Throughout the table package, the internal implementations always use this method to prepare editors so that this default behavior can be safely overridden by a subclass.

Parameters:

editor - the TableCellEditor to set up

row - the row of the cell to edit, where 0 is the first row

column - the column of the cell to edit, where 0 is the first column

Returns:

the Component being edited

---

removeEditor

public void removeEditor()

Discards the editor object and frees the real estate it used for cell rendering.

---

paramString

protected String paramString()

Returns a string representation of this table. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.

Overrides:

paramString in class JComponent

Returns:

a string representation of this table

---

print

public boolean print()
              throws PrinterException

A convenience method that displays a printing dialog, and then prints this JTable in mode PrintMode.FIT_WIDTH, with no header or footer text. A modal progress dialog, with an abort option, will be shown for the duration of printing.

Note: In headless mode, no dialogs are shown and printing occurs on the default printer.

Returns:

true, unless printing is cancelled by the user

Throws:

SecurityException - if this thread is not allowed to initiate a print job request

PrinterException - if an error in the print system causes the job to be aborted

Since:

1.5

See Also:

print(JTable.PrintMode, MessageFormat, MessageFormat, boolean, PrintRequestAttributeSet, boolean, PrintService), getPrintable(javax.swing.JTable.PrintMode, java.text.MessageFormat, java.text.MessageFormat)

---

print

public boolean print(JTable.PrintMode printMode)
              throws PrinterException

A convenience method that displays a printing dialog, and then prints this JTable in the given printing mode, with no header or footer text. A modal progress dialog, with an abort option, will be shown for the duration of printing.

Note: In headless mode, no dialogs are shown and printing occurs on the default printer.

Parameters:

printMode - the printing mode that the printable should use

Returns:

true, unless printing is cancelled by the user

Throws:

SecurityException - if this thread is not allowed to initiate a print job request

PrinterException - if an error in the print system causes the job to be aborted

Since:

1.5

See Also:

print(JTable.PrintMode, MessageFormat, MessageFormat, boolean, PrintRequestAttributeSet, boolean, PrintService), getPrintable(javax.swing.JTable.PrintMode, java.text.MessageFormat, java.text.MessageFormat)

---

print

public boolean print(JTable.PrintMode printMode,
                     MessageFormat headerFormat,
                     MessageFormat footerFormat)
              throws PrinterException

A convenience method that displays a printing dialog, and then prints this JTable in the given printing mode, with the specified header and footer text. A modal progress dialog, with an abort option, will be shown for the duration of printing.

Note: In headless mode, no dialogs are shown and printing occurs on the default printer.

Parameters:

printMode - the printing mode that the printable should use

headerFormat - a MessageFormat specifying the text to be used in printing a header, or null for none

footerFormat - a MessageFormat specifying the text to be used in printing a footer, or null for none

Returns:

true, unless printing is cancelled by the user

Throws:

SecurityException - if this thread is not allowed to initiate a print job request

PrinterException - if an error in the print system causes the job to be aborted

Since:

1.5

See Also:

print(JTable.PrintMode, MessageFormat, MessageFormat, boolean, PrintRequestAttributeSet, boolean, PrintService), getPrintable(javax.swing.JTable.PrintMode, java.text.MessageFormat, java.text.MessageFormat)

---

print

public boolean print(JTable.PrintMode printMode,
                     MessageFormat headerFormat,
                     MessageFormat footerFormat,
                     boolean showPrintDialog,
                     PrintRequestAttributeSet attr,
                     boolean interactive)
              throws PrinterException,
                     HeadlessException

Prints this table, as specified by the fully featured print method, with the default printer specified as the print service.

Parameters:

printMode - the printing mode that the printable should use

headerFormat - a MessageFormat specifying the text to be used in printing a header, or null for none

footerFormat - a MessageFormat specifying the text to be used in printing a footer, or null for none

showPrintDialog - whether or not to display a print dialog

attr - a PrintRequestAttributeSet specifying any printing attributes, or null for none

interactive - whether or not to print in an interactive mode

Returns:

true, unless printing is cancelled by the user

Throws:

HeadlessException - if the method is asked to show a printing dialog or run interactively, and GraphicsEnvironment.isHeadless returns true

SecurityException - if this thread is not allowed to initiate a print job request

PrinterException - if an error in the print system causes the job to be aborted

Since:

1.5

See Also:

print(JTable.PrintMode, MessageFormat, MessageFormat, boolean, PrintRequestAttributeSet, boolean, PrintService), getPrintable(javax.swing.JTable.PrintMode, java.text.MessageFormat, java.text.MessageFormat)

---

print

public boolean print(JTable.PrintMode printMode,
                     MessageFormat headerFormat,
                     MessageFormat footerFormat,
                     boolean showPrintDialog,
                     PrintRequestAttributeSet attr,
                     boolean interactive,
                     PrintService service)
              throws PrinterException,
                     HeadlessException

Prints this JTable. Takes steps that the majority of developers would take in order to print a JTable. In short, it prepares the table, calls getPrintable to fetch an appropriate Printable, and then sends it to the printer.

A boolean parameter allows you to specify whether or not a printing dialog is displayed to the user. When it is, the user may use the dialog to change the destination printer or printing attributes, or even to cancel the print. Another two parameters allow for a PrintService and printing attributes to be specified. These parameters can be used either to provide initial values for the print dialog, or to specify values when the dialog is not shown.

A second boolean parameter allows you to specify whether or not to perform printing in an interactive mode. If true, a modal progress dialog, with an abort option, is displayed for the duration of printing . This dialog also prevents any user action which may affect the table. However, it can not prevent the table from being modified by code (for example, another thread that posts updates using SwingUtilities.invokeLater). It is therefore the responsibility of the developer to ensure that no other code modifies the table in any way during printing (invalid modifications include changes in: size, renderers, or underlying data). Printing behavior is undefined when the table is changed during printing.

If false is specified for this parameter, no dialog will be displayed and printing will begin immediately on the event-dispatch thread. This blocks any other events, including repaints, from being processed until printing is complete. Although this effectively prevents the table from being changed, it doesn't provide a good user experience. For this reason, specifying false is only recommended when printing from an application with no visible GUI.

Note: Attempting to show the printing dialog or run interactively, while in headless mode, will result in a HeadlessException.

Before fetching the printable, this method will gracefully terminate editing, if necessary, to prevent an editor from showing in the printed result. Additionally, JTable will prepare its renderers during printing such that selection and focus are not indicated. As far as customizing further how the table looks in the printout, developers can provide custom renderers or paint code that conditionalize on the value of JComponent.isPaintingForPrint().

See getPrintable(javax.swing.JTable.PrintMode, java.text.MessageFormat, java.text.MessageFormat) for more description on how the table is printed.

Parameters:

printMode - the printing mode that the printable should use

headerFormat - a MessageFormat specifying the text to be used in printing a header, or null for none

footerFormat - a MessageFormat specifying the text to be used in printing a footer, or null for none

showPrintDialog - whether or not to display a print dialog

attr - a PrintRequestAttributeSet specifying any printing attributes, or null for none

interactive - whether or not to print in an interactive mode

service - the destination PrintService, or null to use the default printer

Returns:

true, unless printing is cancelled by the user

Throws:

HeadlessException - if the method is asked to show a printing dialog or run interactively, and GraphicsEnvironment.isHeadless returns true

SecurityException - if a security manager exists and its SecurityManager.checkPrintJobAccess() method disallows this thread from creating a print job request

PrinterException - if an error in the print system causes the job to be aborted

Since:

1.6

See Also:

getPrintable(javax.swing.JTable.PrintMode, java.text.MessageFormat, java.text.MessageFormat), GraphicsEnvironment.isHeadless()

---

getPrintable

public Printable getPrintable(JTable.PrintMode printMode,
                              MessageFormat headerFormat,
                              MessageFormat footerFormat)

Return a Printable for use in printing this JTable.

This method is meant for those wishing to customize the default Printable implementation used by JTable's print methods. Developers wanting simply to print the table should use one of those methods directly.

The Printable can be requested in one of two printing modes. In both modes, it spreads table rows naturally in sequence across multiple pages, fitting as many rows as possible per page. PrintMode.NORMAL specifies that the table be printed at its current size. In this mode, there may be a need to spread columns across pages in a similar manner to that of the rows. When the need arises, columns are distributed in an order consistent with the table's ComponentOrientation. PrintMode.FIT_WIDTH specifies that the output be scaled smaller, if necessary, to fit the table's entire width (and thereby all columns) on each page. Width and height are scaled equally, maintaining the aspect ratio of the output.

The Printable heads the portion of table on each page with the appropriate section from the table's JTableHeader, if it has one.

Header and footer text can be added to the output by providing MessageFormat arguments. The printing code requests Strings from the formats, providing a single item which may be included in the formatted string: an Integer representing the current page number.

You are encouraged to read the documentation for MessageFormat as some characters, such as single-quote, are special and need to be escaped.

Here's an example of creating a MessageFormat that can be used to print "Duke's Table: Page - " and the current page number:

     // notice the escaping of the single quote
     // notice how the page number is included with "{0}"
     MessageFormat format = new MessageFormat("Duke''s Table: Page - {0}");
 

The Printable constrains what it draws to the printable area of each page that it prints. Under certain circumstances, it may find it impossible to fit all of a page's content into that area. In these cases the output may be clipped, but the implementation makes an effort to do something reasonable. Here are a few situations where this is known to occur, and how they may be handled by this particular implementation:

• In any mode, when the header or footer text is too wide to fit completely in the printable area -- print as much of the text as possible starting from the beginning, as determined by the table's ComponentOrientation.
• In any mode, when a row is too tall to fit in the printable area -- print the upper-most portion of the row and paint no lower border on the table.
• In PrintMode.NORMAL when a column is too wide to fit in the printable area -- print the center portion of the column and leave the left and right borders off the table.

It is entirely valid for this Printable to be wrapped inside another in order to create complex reports and documents. You may even request that different pages be rendered into different sized printable areas. The implementation must be prepared to handle this (possibly by doing its layout calculations on the fly). However, providing different heights to each page will likely not work well with PrintMode.NORMAL when it has to spread columns across pages.

As far as customizing how the table looks in the printed result, JTable itself will take care of hiding the selection and focus during printing. For additional customizations, your renderers or painting code can customize the look based on the value of JComponent.isPaintingForPrint()

Also, before calling this method you may wish to first modify the state of the table, such as to cancel cell editing or have the user size the table appropriately. However, you must not modify the state of the table after this Printable has been fetched (invalid modifications include changes in size or underlying data). The behavior of the returned Printable is undefined once the table has been changed.

Parameters:

printMode - the printing mode that the printable should use

headerFormat - a MessageFormat specifying the text to be used in printing a header, or null for none

footerFormat - a MessageFormat specifying the text to be used in printing a footer, or null for none

Returns:

a Printable for printing this JTable

Since:

1.5

See Also:

print(JTable.PrintMode, MessageFormat, MessageFormat, boolean, PrintRequestAttributeSet, boolean), Printable, PrinterJob

---

getAccessibleContext

public AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this JTable. For tables, the AccessibleContext takes the form of an AccessibleJTable. A new AccessibleJTable instance is created if necessary.

Specified by:

getAccessibleContext in interface Accessible

Overrides:

getAccessibleContext in class JComponent

Returns:

an AccessibleJTable that serves as the AccessibleContext of this JTable

---

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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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