TO DISPLAY BOUNCING OF A BALL IN JAVA

/*
 CG
TOPIC: TO DISPLAY BOUNCING OF A BALL IN JAVA
*/
import java.applet.*;
import java.awt.*;

public class ball extends Applet implements Runnable
 {
 Thread t;
 int x = 0;
 int y = 0;

public void start()
 {
 t = new Thread(this);
 t.start();
 }

public void paint(Graphics g)
   {
      System.out.println("CODED BY TG ");
      g.fillOval(x,y,100,100);
    }

public void run()
 {
   try
      {
    for(;;)
         {
                for(;;)
              {
               if(y == 300)
                   {
                   System.out.print("\007");
                    break;
                   }
                      else
                   {
                       y = y +3;
                    x = x;
                        Thread.sleep(100);
               repaint();
                }
              }
        for(;;)
                {
             if(y==0)
                 {
                     System.out.print("\007");
                        break;
                           }
     
else
                {
 y = y-3;
            x = x+3;
            Thread.sleep(100);
                 repaint();
                }
                  }
              run();
       }
  }

catch(InterruptedException e)
    {

    }
 }
}
 /* CODED BY TG
 <applet code = "ball" width = 1000 height = 1000> </applet> */