java.awt

Class CheckboxMenuItem

java.lang.Object

java.awt.MenuComponent

java.awt.MenuItem

java.awt.CheckboxMenuItem

All Implemented Interfaces:

ItemSelectable, Serializable, Accessible

public class CheckboxMenuItem
extends MenuItem
implements ItemSelectable, Accessible

This class represents a check box that can be included in a menu. Selecting the check box in the menu changes its state from "on" to "off" or from "off" to "on."

The following picture depicts a menu which contains an instance of CheckBoxMenuItem:

The item labeled Check shows a check box menu item in its "off" state.

When a check box menu item is selected, AWT sends an item event to the item. Since the event is an instance of ItemEvent, the processEvent method examines the event and passes it along to processItemEvent. The latter method redirects the event to any ItemListener objects that have registered an interest in item events generated by this menu item.

Since:

JDK1.0

See Also:

ItemEvent, ItemListener, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	CheckboxMenuItem.AccessibleAWTCheckboxMenuItem Inner class of CheckboxMenuItem used to provide default support for accessibility.

Nested classes/interfaces inherited from class java.awt.MenuItem

MenuItem.AccessibleAWTMenuItem

Nested classes/interfaces inherited from class java.awt.MenuComponent

MenuComponent.AccessibleAWTMenuComponent

Constructor Summary

Constructors

Constructor and Description
CheckboxMenuItem() Create a check box menu item with an empty label.
CheckboxMenuItem(String label) Create a check box menu item with the specified label.
CheckboxMenuItem(String label, boolean state) Create a check box menu item with the specified label and state.

Method Summary

Methods

Modifier and Type	Method and Description
void	addItemListener(ItemListener l) Adds the specified item listener to receive item events from this check box menu item.
void	addNotify() Creates the peer of the checkbox item.
AccessibleContext	getAccessibleContext() Gets the AccessibleContext associated with this CheckboxMenuItem.
ItemListener[]	getItemListeners() Returns an array of all the item listeners registered on this checkbox menuitem.
<T extends EventListener> T[]	getListeners(Class<T> listenerType) Returns an array of all the objects currently registered as FooListeners upon this CheckboxMenuItem.
Object[]	getSelectedObjects() Returns the an array (length 1) containing the checkbox menu item label or null if the checkbox is not selected.
boolean	getState() Determines whether the state of this check box menu item is "on" or "off."
String	paramString() Returns a string representing the state of this CheckBoxMenuItem.
protected void