1. /*

  2.  * @(#)KeyListener.java	1.11 01/11/29

  3.  *

  4.  * Copyright 2002 Sun Microsystems, Inc. All rights reserved.

  5.  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

  6.  */

  7. 

  8. package java.awt.event;

  9. 

  10. import java.util.EventListener;

  11. 

  12. /**

  13.  * The listener interface for receiving keyboard events (keystrokes).

  14.  * The class that is interested in processing a keyboard event

  15.  * either implements this interface (and all the methods it

  16.  * contains) or extends the abstract <code>KeyAdapter</code> class

  17.  * (overriding only the methods of interest).

  18.  * <P>

  19.  * The listener object created from that class is then registered with a

  20.  * component using the component's <code>addKeyListener</code> 

  21.  * method. A keyboard event is generated when a key is pressed, released,

  22.  * or typed (pressedn and released). The relevant method in the listener 

  23.  * object is then invoked, and the <code>KeyEvent</code> is passed to it.

  24.  *

  25.  * @see KeyAdapter

  26.  * @see KeyEvent

  27.  * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/keylistener.html">Tutorial: Writing a Key Listener</a>

  28.  * @see <a href="http://www.awl.com/cp/javaseries/jcl1_2.html">Reference: The Java Class Libraries (update file)</a>

  29.  *

  30.  * @version 1.11 11/29/01

  31.  * @author Carl Quinn

  32.  */

  33. public interface KeyListener extends EventListener {

  34. 

  35.     /**

  36.      * Invoked when a key has been typed.

  37.      * This event occurs when a key press is followed by a key release.

  38.      */

  39.     public void keyTyped(KeyEvent e);

  40. 

  41.     /**

  42.      * Invoked when a key has been pressed.

  43.      */

  44.     public void keyPressed(KeyEvent e);

  45. 

  46.     /**

  47.      * Invoked when a key has been released.

  48.      */

  49.     public void keyReleased(KeyEvent e);

  50. }