MouseListener in Java Awt Example

The MouseEvent event is used by two different interfaces:

java.awt.event.MouseListener and java.awt.event.MouseMotionListener. The first interface is designed to process events button press and mouse detection entrance and exit of a mouse over a component. The second is the processing the mouse movement.

The java.awt.event.MouseListener interface requires the implementation of severalmethods : mousePressed, mouseReleased, mouseEntered, and mouseExitedmouseClicked. To reduce the amount of required code can opt for the extension of the class java.awt.event.MouseAdapter that provides a null implementation of the above methods.

The java.awt.event.MouseMotionListener interface requires the implementation of following methods : mouseDragged and mouseMoved . As for the interface MouseListener, can opt for the extension of the class to MouseMotionAdapter reducing the amount of code required . The MouseEvent event has the following specific methods :

import java.applet.Applet; 
 import java.awt.*; 
 import java.awt.event.MouseListener; 
 import java.awt.event.MouseEvent; 
 /* <APPLET CODE ="MouselistenerJavaAwt.class" WIDTH=300 HEIGHT=200> </APPLET> */ 
 public class MouselistenerJavaAwt extends Applet implements MouseListener 
    { 
         TextField t; 
         public void init() 
           { 
               t=new TextField(100); 
               add(t); 
               addMouseListener(this); 
           } 
               public void mousePressed(MouseEvent e) 
                 { 
                    t.setText("Mouse Pressed; # of clicks:"+e.getClickCount()+"at position"+e.getX()+","+e.getY()); 
                 } 
                     public void mouseReleased(MouseEvent e) 
                          { 
                            t.setText("Mouse Released; # of clicks:"+e.getClickCount()); 
                         } 
                             public void mouseEntered(MouseEvent e) 
                                { 
                                   t.setText("Mouse Entered"); 
                                } 
                                    public void mouseExited(MouseEvent e) 
                                      { 
                                         t.setText("Mouse exited"); 
                                      }          
                                          public void mouseClicked(MouseEvent e) 
                                           { 
                                               t.setText("mouse clicked(# of clicks:"+e.getClickCount()); 
                                           } 
    }