ItemSelectable (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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java.awt
Interface ItemSelectable

All Known Subinterfaces:: ButtonModel

All Known Implementing Classes:: AbstractButton, Checkbox, CheckboxMenuItem, Choice, DefaultButtonModel, JComboBox, List

public interface ItemSelectable

The interface for objects which contain a set of items for which zero or more can be selected.

Method Summary

void addItemListener(ItemListener l)
          Adds a listener to receive item events when the state of an item is changed by the user.

Object[] getSelectedObjects()
          Returns the selected items or null if no items are selected.

void removeItemListener(ItemListener l)
          Removes an item listener.

Method Detail

getSelectedObjects

public Object[] getSelectedObjects()

Returns the selected items or null if no items are selected.

addItemListener

public void addItemListener(ItemListener l)

Adds a listener to receive item events when the state of an item is changed by the user. Item events are not sent when an item's state is set programmatically. If l is null, no exception is thrown and no action is performed.

Parameters:: l - the listener to receive events
See Also:: ItemEvent

removeItemListener

public void removeItemListener(ItemListener l)

Removes an item listener. If l is null, no exception is thrown and no action is performed.

Parameters:: l - the listener being removed
See Also:: ItemEvent