ADAPTER CLASSES

     Event adapters facilitate implementing listener interfaces. Many event listener interfaces have more than one event listener methods. For such interfaces, Java technology defines adapter classes. These have empty implementation of all the event listener methods defined in the interface they implement. A listener can subclass the adapter and override only stub methods for handling events of interest. The table below lists the low level event listener interfaces and their adapters.

      The table below shows the adapter classes in java.awt.event and notes the interface that each implements.

Adapter Class	Listener Interface
ComponentAdapter	ComponentListener
ContainerAdapter	ContainerListener
FocusAdapter	FocusListener
KeyAdapter	KeyListener
MouseAdapter	MouseListener
MouseMotionAdapter	MouseMotionListener
WindowAdapter	WindowListener

     Example:

import java.awt.event.*;

import java.applet.*;

import java.awt.*;

public class MyAdapterApplet extends Applet

{

 public void init()

 {

  addMouseListener(new MyAdapter(this));

 }

}

class MyAdapter extends MouseAdapter

{

 MyAdapterApplet ap;

 public MyAdapter(MyAdapterApplet adp)

 {

  this.ap=adp;

 }

 public void mouseClicked(MouseEvent e)

 {

  ap.showStatus("Mouse Clicked");

}

}

OUTPUT: