/*
* @(#)FocusListener.java 1.15 03/12/19
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package java.awt.event;
import java.util.EventListener;
/**
* The listener interface for receiving keyboard focus events on
* a component.
* The class that is interested in processing a focus event
* either implements this interface (and all the methods it
* contains) or extends the abstract FocusAdapter
class
* (overriding only the methods of interest).
* The listener object created from that class is then registered with a
* component using the component's addFocusListener
* method. When the component gains or loses the keyboard focus,
* the relevant method in the listener object
* is invoked, and the FocusEvent
is passed to it.
*
* @see FocusAdapter
* @see FocusEvent
* @see Tutorial: Writing a Focus Listener
* @see Reference: The Java Class Libraries (update file)
*
* @author Carl Quinn
* @version 1.15 12/19/03
* @since 1.1
*/
public interface FocusListener extends EventListener {
/**
* Invoked when a component gains the keyboard focus.
*/
public void focusGained(FocusEvent e);
/**
* Invoked when a component loses the keyboard focus.
*/
public void focusLost(FocusEvent e);
}