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KeyListener.java
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73 lines (67 loc) · 1.76 KB
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/*
* Copyright (c) 1996, 2014, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.awt.event;
import java.util.EventListener;
/**
* The listener interface for receiving keyboard events (keystrokes).
* The class that is interested in processing a keyboard event
* either implements this interface (and all the methods it
* contains) or extends the abstract <code>KeyAdapter</code> class
* (overriding only the methods of interest).
* <P>
* The listener object created from that class is then registered with a
* component using the component's <code>addKeyListener</code>
* method. A keyboard event is generated when a key is pressed, released,
* or typed. The relevant method in the listener
* object is then invoked, and the <code>KeyEvent</code> is passed to it.
*
* @author Carl Quinn
*
* @see KeyAdapter
* @see KeyEvent
* @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/keylistener.html">Tutorial: Writing a Key Listener</a>
*
* @since 1.1
*/
public interface KeyListener extends EventListener {
/**
* Invoked when a key has been typed.
* See the class description for {@link KeyEvent} for a definition of
* a key typed event.
*/
public void keyTyped(KeyEvent e);
/**
* Invoked when a key has been pressed.
* See the class description for {@link KeyEvent} for a definition of
* a key pressed event.
*/
public void keyPressed(KeyEvent e);
/**
* Invoked when a key has been released.
* See the class description for {@link KeyEvent} for a definition of
* a key released event.
*/
public void keyReleased(KeyEvent e);
}