KeyAdapter (Java 2 Platform SE 5.0) (original) (raw)

java.awt.event

Class KeyAdapter

java.lang.Object extended by java.awt.event.KeyAdapter

All Implemented Interfaces:

KeyListener, EventListener

Direct Known Subclasses:

BasicComboBoxUI.KeyHandler, BasicComboPopup.InvocationKeyHandler, BasicTreeUI.KeyHandler

public abstract class KeyAdapter

extends Object

implements KeyListener

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.

Since:

1.1

Constructor Summary
KeyAdapter()

Method Summary
void	keyPressed(KeyEvent e) Invoked when a key has been pressed.
void	keyReleased(KeyEvent e) Invoked when a key has been released.
void	keyTyped(KeyEvent e) Invoked when a key has been typed.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, [wait](../../../java/lang/Object.html#wait%28long, int%29)

Constructor Detail

KeyAdapter

public KeyAdapter()

Method Detail

keyTyped

public void keyTyped(KeyEvent e)

Invoked when a key has been typed. This event occurs when a key press is followed by a key release.

Specified by:

[keyTyped](../../../java/awt/event/KeyListener.html#keyTyped%28java.awt.event.KeyEvent%29) in interface [KeyListener](../../../java/awt/event/KeyListener.html "interface in java.awt.event")

keyPressed

public void keyPressed(KeyEvent e)

Invoked when a key has been pressed.

Specified by:

[keyPressed](../../../java/awt/event/KeyListener.html#keyPressed%28java.awt.event.KeyEvent%29) in interface [KeyListener](../../../java/awt/event/KeyListener.html "interface in java.awt.event")

keyReleased

public void keyReleased(KeyEvent e)

Invoked when a key has been released.

Specified by:

[keyReleased](../../../java/awt/event/KeyListener.html#keyReleased%28java.awt.event.KeyEvent%29) in interface [KeyListener](../../../java/awt/event/KeyListener.html "interface in java.awt.event")

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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.