JavaTM 2 Platform Std. Ed. v1.4.2
- All Implemented Interfaces:
- EventListener, FocusListener
- Direct Known Subclasses:
- BasicSplitPaneUI.FocusHandler, BasicTabbedPaneUI.FocusHandler
- public abstract class FocusAdapter
- extends Object
- implements FocusListener
An abstract adapter class for receiving keyboard focus events.
The methods in this class are empty. This class exists as
convenience for creating listener objects.
Extend this class to create a
and override the methods for the events of interest. (If you implement the
FocusListener interface, you have to define all of
the methods in it. This abstract class defines null methods for them
all, so you can only have to define methods for events you care about.)
Create a listener object using the extended class and then register it with
a component using the component's
method. When the component gains or loses the keyboard focus,
the relevant method in the listener object is invoked,
FocusEvent is passed to it.
- See Also:
Tutorial: Writing a Focus Listener,
Reference: The Java Class Libraries (update file)
|Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public void focusGained(FocusEvent e)
- Invoked when a component gains the keyboard focus.
- Specified by:
focusGained in interface
public void focusLost(FocusEvent e)
- Invoked when a component loses the keyboard focus.
- Specified by:
focusLost in interface
Copyright 2003 Sun Microsystems, Inc. All rights reserved