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1 /*
2  * @(#)KeyAdapter.java 1.17 03/12/19
3  *
4  * Copyright 2004 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 /**
11  * An abstract adapter class for receiving keyboard events.
12  * The methods in this class are empty. This class exists as
13  * convenience for creating listener objects.
14  * <P>
15  * Extend this class to create a <code>KeyEvent</code> listener
16  * and override the methods for the events of interest. (If you implement the
17  * <code>KeyListener</code> interface, you have to define all of
18  * the methods in it. This abstract class defines null methods for them
19  * all, so you can only have to define methods for events you care about.)
20  * <P>
21  * Create a listener object using the extended class and then register it with
22  * a component using the component's <code>addKeyListener</code>
23  * method. When a key is pressed, released, or typed,
24  * the relevant method in the listener object is invoked,
25  * and the <code>KeyEvent</code> is passed to it.
26  *
27  * @author Carl Quinn
28  * @version 1.17 12/19/03
29  *
30  * @see KeyEvent
31  * @see KeyListener
32  * @see <a HREF="http://java.sun.com/docs/books/tutorial/post1.0/ui/keylistener.html">Tutorial: Writing a Key Listener</a>
33  * @see <a HREF="http://www.awl.com/cp/javaseries/jcl1_2.html">Reference: The Java Class Libraries (update file)</a>
34  *
35  * @since 1.1
36  */
37 public abstract class KeyAdapter implements KeyListener JavaDoc {
38     /**
39      * Invoked when a key has been typed.
40      * This event occurs when a key press is followed by a key release.
41      */
42     public void keyTyped(KeyEvent JavaDoc e) {}
43
44     /**
45      * Invoked when a key has been pressed.
46      */
47     public void keyPressed(KeyEvent JavaDoc e) {}
48
49     /**
50      * Invoked when a key has been released.
51      */
52     public void keyReleased(KeyEvent JavaDoc e) {}
53 }
54
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