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70 lines
1.7 KiB
70 lines
1.7 KiB
/*
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* Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*/
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package java.awt.event;
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/**
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* An abstract adapter class for receiving keyboard events.
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* The methods in this class are empty. This class exists as
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* convenience for creating listener objects.
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* <P>
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* Extend this class to create a <code>KeyEvent</code> listener
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* and override the methods for the events of interest. (If you implement the
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* <code>KeyListener</code> interface, you have to define all of
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* the methods in it. This abstract class defines null methods for them
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* all, so you can only have to define methods for events you care about.)
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* <P>
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* Create a listener object using the extended class and then register it with
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* a component using the component's <code>addKeyListener</code>
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* method. When a key is pressed, released, or typed,
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* the relevant method in the listener object is invoked,
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* and the <code>KeyEvent</code> is passed to it.
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*
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* @author Carl Quinn
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*
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* @see KeyEvent
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* @see KeyListener
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* @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/keylistener.html">Tutorial: Writing a Key Listener</a>
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*
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* @since 1.1
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*/
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public abstract class KeyAdapter implements KeyListener {
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/**
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* Invoked when a key has been typed.
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* This event occurs when a key press is followed by a key release.
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*/
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public void keyTyped(KeyEvent e) {}
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/**
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* Invoked when a key has been pressed.
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*/
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public void keyPressed(KeyEvent e) {}
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/**
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* Invoked when a key has been released.
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*/
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public void keyReleased(KeyEvent e) {}
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}
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