1  import java.awt.event.ActionEvent;

  2  import java.awt.event.ActionListener;

  3  import javax.swing.JFrame;

  4  import javax.swing.Timer;

  5  

  6  /** 	 	 	 	 	 	

  7     This program moves the rectangle.

  8  */

  9  public class RectangleMover

 10  {

 11     private static final int FRAME_WIDTH = 300;

 12     private static final int FRAME_HEIGHT = 400;

 13  

 14     public static void main(String[] args)

 15     {

 16        JFrame frame = new JFrame();

 17  

 18        frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);

 19        frame.setTitle("An animated rectangle");

 20        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 21  

 22        final RectangleComponent component = new RectangleComponent();

 23        frame.add(component);

 24  

 25        frame.setVisible(true);

 26        

 27        class TimerListener implements ActionListener

 28        {

 29           public void actionPerformed(ActionEvent event)

 30           {

 31              component.moveBy(1, 1);

 32           }

 33        }

 34  

 35        ActionListener listener = new TimerListener();

 36  

 37        final int DELAY = 100; // Milliseconds between timer ticks

 38        Timer t = new Timer(DELAY, listener);

 39        t.start();      

 40     }

 41  }