KeyListener
, EventListener
BasicComboBoxUI.KeyHandler
, BasicComboPopup.InvocationKeyHandler
, BasicTreeUI.KeyHandler
public abstract class KeyAdapter extends Object implements KeyListener
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.
Modifier | Constructor | Description |
---|---|---|
protected |
Constructs a KeyAdapter . |
Modifier and Type | Method | Description |
---|---|---|
void |
keyPressed |
Invoked when a key has been pressed. |
void |
keyReleased |
Invoked when a key has been released. |
void |
keyTyped |
Invoked when a key has been typed. |
protected KeyAdapter()
KeyAdapter
.public void keyTyped(KeyEvent e)
keyTyped
in interface KeyListener
e
- the event to be processedpublic void keyPressed(KeyEvent e)
keyPressed
in interface KeyListener
e
- the event to be processedpublic void keyReleased(KeyEvent e)
keyReleased
in interface KeyListener
e
- the event to be processed
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/event/KeyAdapter.html