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CheckboxMenuItem

Name

CheckboxMenuItem

[Graphic: Figure from the text]

Description

The CheckboxMenuItem class represents a menu item with a boolean state.

Class Definition

public class java.awt.CheckboxMenuItem
    extends java.awt.MenuItem
    implements java.awt.ItemSelectable {
  
  // Constructors
  public CheckboxMenuItem(); (New)
  public CheckboxMenuItem (String label);
  public CheckboxMenuItem (String label, boolean state); (New)
  
  // Instance Methods
  public void addItemListener (ItemListener l); (New)
  public void addNotify();
  public Object[] getSelectedObjects(); (New)
  public boolean getState();
  public String paramString();
  public void removeItemListener (ItemListener l); (New)
  public synchronized void setState (boolean condition);
  
  // Protected Instance Methods
  protected void processEvent (AWTEvent e); (New)
  protected void processItemEvent (ItemEvent e); (New)
}

Constructors

CheckboxMenuItem

public CheckboxMenuItem() (New)

Description

Constructs a CheckboxMenuItem object with no label.

public CheckboxMenuItem (String label)

Parameters

label

Text that appears on CheckboxMenuItem.

Description

Constructs a CheckboxMenuItem object whose value is initially false.

public CheckboxMenuItem (String label, boolean state) (New)

Parameters

label

Text that appears on CheckboxMenuItem.

state

The initial state of the menu item.

Description

Constructs a CheckboxMenuItem object with the specified label and state.

Instance Methods

addItemListener

public void addItemListener (ItemListener l) (New)

Parameters

l

The listener to be added.

Implements

ItemSelectable.addItemListener(ItemListener l)

Description

Adds a listener for the ItemEvent objects this CheckboxMenuItem fires off.

addNotify

public void addNotify()

Overrides

MenuItem.addNotify()

Description

Creates CheckboxMenuItem's peer.

getSelectedObjects

public Object[] getSelectedObjects() (New)

Implements

ItemSelectable.getSelectedObjects()

Description

If the CheckboxMenuItem is checked, returns an array with length 1 containing the label of the CheckboxMenuItem; otherwise returns null.

getState

public boolean getState()

Returns

The current state of the CheckboxMenuItem.

paramString

public String paramString()

Returns

A string with current settings of CheckboxMenuItem.

Overrides

MenuItem.paramString()

Description

Helper method for toString() to generate string of current settings.

removeItemListener

public void removeItemListener (ItemListener l) (New)

Parameters

l

The listener to be removed.

Implements

ItemSelectable.removeItemListener (ItemListener l)

Description

Removes the specified ItemListener so it will not receive ItemEvent objects from this CheckboxMenuItem.

setState

public synchronized void setState (boolean condition)

Parameters

condition

New state for the CheckboxMenuItem.

Description

Changes the state of the CheckboxMenuItem.

Protected Instance Methods

processEvent

protected void processEvent(AWTEvent e) (New)

Parameters

e

The event to process.

Overrides

MenuItem.processEvent(AWTEvent)

Description

Low level AWTEvents are passed to this method for processing.

processItemEvent

protected void processItemEvent(ItemEvent e) (New)

Parameters

e

The item event to process.

Description

Item events are passed to this method for processing. Normally, this method is called by processEvent().

See Also

ItemEvent, ItemSelectable, MenuItem, String


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