/*

 * Copyright (c) 1996, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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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);

}