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Java 2 Platform SE v1.3.1: Class Panel - JDK 5 Documentation v1.3.1, Java 2 SDK 英文文档

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java.awt
Class Panel

java.lang.Object
  |
  +--java.awt.Component
        |
        +--java.awt.Container
              |
              +--java.awt.Panel

All Implemented Interfaces:

Accessible, ImageObserver, MenuContainer, Serializable

Direct Known Subclasses:

Applet

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public class Panel

extends Container

implements Accessible

Panel is the simplest container class. A panel provides space in which an application can attach any other component, including other panels.

The default layout manager for a panel is the FlowLayout layout manager.

Since:

JDK1.0

See Also:

FlowLayout, Serialized Form

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Inner Class Summary
protected  class	Panel.AccessibleAWTPanel           This class implements accessibility support for the Panel class.

 

Inner classes inherited from class java.awt.Container

Container.AccessibleAWTContainer

 

Inner classes inherited from class java.awt.Component

Component.AccessibleAWTComponent

 

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

Panel()           Creates a new panel using the default layout manager.

Panel(LayoutManager layout)           Creates a new panel with the specified layout manager.

 

Method Summary
void	addNotify()           Creates the Panel's peer.
AccessibleContext	getAccessibleContext()           Gets the AccessibleContext associated with this Panel.

 

Methods inherited from class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getAlignmentX, getAlignmentY, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getInsets, getLayout, getListeners, getMaximumSize, getMinimumSize, getPreferredSize, insets, invalidate, isAncestorOf, layout, list, list, locate, minimumSize, paint, paintComponents, paramString, preferredSize, print, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, removeNotify, setFont, setLayout, update, validate, validateTree

 

Methods inherited from class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addPropertyChangeListener, addPropertyChangeListener, bounds, checkImage, checkImage, coalesceEvents, contains, contains, createImage, createImage, disable, disableEvents, dispatchEvent, enable, enable, enableEvents, enableInputMethods, firePropertyChange, getBackground, getBounds, getBounds, getColorModel, getComponentOrientation, getCursor, getDropTarget, getFont, getFontMetrics, getForeground, getGraphics, getGraphicsConfiguration, getHeight, getInputContext, getInputMethodRequests, getLocale, getLocation, getLocation, getLocationOnScreen, getName, getParent, getPeer, getSize, getSize, getToolkit, getTreeLock, getWidth, getX, getY, gotFocus, handleEvent, hasFocus, hide, imageUpdate, inside, isDisplayable, isDoubleBuffered, isEnabled, isFocusTraversable, isLightweight, isOpaque, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, printAll, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processKeyEvent, processMouseEvent, processMouseMotionEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, repaint, requestFocus, reshape, resize, resize, setBackground, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setEnabled, setForeground, setLocale, setLocation, setLocation, setName, setSize, setSize, setVisible, show, show, size, toString, transferFocus

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Constructor Detail

Panel

public Panel()

Creates a new panel using the default layout manager. The default layout manager for all panels is the FlowLayout class.

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Panel

public Panel(LayoutManager layout)

Creates a new panel with the specified layout manager.

Parameters:

layout - the layout manager for this panel.

Since:

JDK1.1

Method Detail

addNotify

public void addNotify()

Creates the Panel's peer. The peer allows you to modify the appearance of the panel without changing its functionality.

Overrides:

addNotify in class Container

Following copied from class: java.awt.Container

See Also:

Component.isDisplayable(), Container.removeNotify()

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getAccessibleContext

public AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this Panel. For panels, the AccessibleContext takes the form of an AccessibleAWTPanel. A new AccessibleAWTPanel instance is created if necessary.

Specified by:

getAccessibleContext in interface Accessible

Overrides:

getAccessibleContext in class Component

Returns:

an AccessibleAWTPanel that serves as the AccessibleContext of this Panel

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