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SpinnerListModel (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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javax.swing
Class SpinnerListModel

java.lang.Object
  javax.swing.AbstractSpinnerModel
      javax.swing.SpinnerListModel

All Implemented Interfaces:

Serializable, SpinnerModel

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public class SpinnerListModel
extends AbstractSpinnerModel
implements Serializable

A simple implementation of SpinnerModel whose values are defined by an array or a List. For example to create a model defined by an array of the names of the days of the week:

 String[] days = new DateFormatSymbols().getWeekdays();
 SpinnerModel model = new SpinnerListModel(Arrays.asList(days).subList(1, 8));
 

This class only stores a reference to the array or List so if an element of the underlying sequence changes, it's up to the application to notify the ChangeListeners by calling fireStateChanged.

This model inherits a ChangeListener. The ChangeListeners are notified whenever the model's value or list properties changes.

Since:

1.4

See Also:

JSpinner, SpinnerModel, AbstractSpinnerModel, SpinnerNumberModel, SpinnerDateModel

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Field Summary

 

Fields inherited from class javax.swing.AbstractSpinnerModel
listenerList

 

Constructor Summary
SpinnerListModel()           Constructs an effectively empty SpinnerListModel.
SpinnerListModel(List<?> values)           Constructs a SpinnerModel whose sequence of values is defined by the specified List.
SpinnerListModel(Object[] values)           Constructs a SpinnerModel whose sequence of values is defined by the specified array.

 

Method Summary
List<?>	getList()           Returns the List that defines the sequence for this model.
Object	getNextValue()           Returns the next legal value of the underlying sequence or null if value is already the last element.
Object	getPreviousValue()           Returns the previous element of the underlying sequence or null if value is already the first element.
Object	getValue()           Returns the current element of the sequence.
void	setList(List<?> list)           Changes the list that defines this sequence and resets the index of the models value to zero.
void	setValue(Object elt)           Changes the current element of the sequence and notifies ChangeListeners.

 

Methods inherited from class javax.swing.AbstractSpinnerModel
addChangeListener, fireStateChanged, getChangeListeners, getListeners, removeChangeListener

 

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

 

Constructor Detail

SpinnerListModel

public SpinnerListModel(List<?> values)

Constructs a SpinnerModel whose sequence of values is defined by the specified List. The initial value (current element) of the model will be values.get(0). If values is null or has zero size, an IllegalArugmentException is thrown.

Parameters:

values - the sequence this model represents

Throws:

IllegalArugmentException - if values is null or zero size

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SpinnerListModel

public SpinnerListModel(Object[] values)

Constructs a SpinnerModel whose sequence of values is defined by the specified array. The initial value of the model will be values[0]. If values is null or has zero length, an IllegalArugmentException is thrown.

Parameters:

values - the sequence this model represents

Throws:

IllegalArugmentException - if values is null or zero length

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SpinnerListModel

public SpinnerListModel()

Constructs an effectively empty SpinnerListModel. The model's list will contain a single "empty" string element.

Method Detail

getList

public List<?> getList()

Returns the List that defines the sequence for this model.

Returns:

the value of the list property

See Also:

setList(java.util.List)

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setList

public void setList(List<?> list)

Changes the list that defines this sequence and resets the index of the models value to zero. Note that list is not copied, the model just stores a reference to it.

This method fires a ChangeEvent if list is not equal to the current list.

Parameters:

list - the sequence that this model represents

Throws:

IllegalArgumentException - if list is null or zero length

See Also:

getList()

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getValue

public Object getValue()

Returns the current element of the sequence.

Specified by:

getValue in interface SpinnerModel

Returns:

the value property

See Also:

SpinnerModel.getValue(), setValue(java.lang.Object)

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setValue

public void setValue(Object elt)

Changes the current element of the sequence and notifies ChangeListeners. If the specified value is not equal to an element of the underlying sequence then an IllegalArgumentException is thrown. In the following example the setValue call would cause an exception to be thrown:

 String[] values = {"one", "two", "free", "four"};
 SpinnerModel model = new SpinnerListModel(values);
 model.setValue("TWO");
 

Specified by:

setValue in interface SpinnerModel

Parameters:

elt - the sequence element that will be model's current value

Throws:

IllegalArgumentException - if the specified value isn't allowed

See Also:

SpinnerModel.setValue(java.lang.Object), getValue()

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getNextValue

public Object getNextValue()

Returns the next legal value of the underlying sequence or null if value is already the last element.

Specified by:

getNextValue in interface SpinnerModel

Returns:

the next legal value of the underlying sequence or null if value is already the last element

See Also:

SpinnerModel.getNextValue(), getPreviousValue()

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getPreviousValue

public Object getPreviousValue()

Returns the previous element of the underlying sequence or null if value is already the first element.

Specified by:

getPreviousValue in interface SpinnerModel

Returns:

the previous element of the underlying sequence or null if value is already the first element

See Also:

SpinnerModel.getPreviousValue(), getNextValue()

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For further API reference and developer documentation, see Java 2 SDK 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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