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package java.awt.event;

An abstract adapter class for receiving keyboard events.
The methods in this class are empty. This class exists as
convenience for creating listener objects.
 Extend this class to create a KeyEvent listener and override the methods for the events of interest. (If you implement the KeyListener interface, you have to define all of the methods in it. This abstract class defines null methods for them all, so you can only have to define methods for events you care about.) 
 Create a listener object using the extended class and then register it with a component using the component's addKeyListener method. When a key is pressed, released, or typed, the relevant method in the listener object is invoked, and the KeyEvent is passed to it. 
Author:
Carl Quinn
See Also:
KeyEvent
KeyListener
Tutorial: Writing a Key Listener
Since:
1.1/**
 * An abstract adapter class for receiving keyboard events.
 * The methods in this class are empty. This class exists as
 * convenience for creating listener objects.
 * <P>
 * Extend this class to create a {@code KeyEvent} listener
 * and override the methods for the events of interest. (If you implement the
 * {@code KeyListener} interface, you have to define all of
 * the methods in it. This abstract class defines null methods for them
 * all, so you can only have to define methods for events you care about.)
 * <P>
 * Create a listener object using the extended class and then register it with
 * a component using the component's {@code addKeyListener}
 * method. When a key is pressed, released, or typed,
 * the relevant method in the listener object is invoked,
 * and the {@code KeyEvent} is passed to it.
 *
 * @author Carl Quinn
 *
 * @see KeyEvent
 * @see KeyListener
 * @see <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/keylistener.html">Tutorial: Writing a Key Listener</a>
 *
 * @since 1.1
 */
public abstract class KeyAdapter implements KeyListener {
    
Invoked when a key has been typed.
This event occurs when a key press is followed by a key release.
/**
     * Invoked when a key has been typed.
     * This event occurs when a key press is followed by a key release.
     */
    public void keyTyped(KeyEvent e) {}

    
Invoked when a key has been pressed.
/**
     * Invoked when a key has been pressed.
     */
    public void keyPressed(KeyEvent e) {}

    
Invoked when a key has been released.
/**
     * Invoked when a key has been released.
     */
    public void keyReleased(KeyEvent e) {}
}