import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
 
public class MyAnimation extends JFrame {
   int width;
   int height;
   MyAnimation animation ; 
   MyDrawPanel drawpanel ;
 
   public static void main(String[] args) {
          MyAnimation gui=new MyAnimation();
          gui.go();
   } //close main()
 
   public void go() {
       animation = new MyAnimation();
 
       JButton button = new JButton("Play"); 
       button.addActionListener(new ButtonListener());
       drawpanel = new MyDrawPanel();      
 
       animation.setTitle("Ball Animation");
       animation.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       animation.getContentPane().add(BorderLayout.SOUTH,button);
       animation.getContentPane().add(BorderLayout.CENTER,drawpanel);
       animation.setSize(300,300);
       animation.setVisible(true);
   } //close go()
 
   class ButtonListener implements ActionListener {
       public void actionPerformed(ActionEvent ae) {
          System.out.println("Here in action");
 
          for(width=0,height=0;width<130&&height<130;width++,height++) {
                   System.out.println("before calling");
                   animation.repaint();
                   System.out.println("W ="+width+"H ="+height);
               try {
                   Thread.sleep(50);
               }catch(Exception ex) { }
 
         }  //close for
     }  //close actionPerformed()
 }  //close ButtonListener
 
      class MyDrawPanel extends JPanel {
            public void paintComponent(Graphics g) {
               g.setColor(Color.blue);
               g.fillRect(0,0,this.getWidth(),this.getHeight());
               int w= this.getWidth();
               int h = this.getHeight();
               //System.out.print(w,h);
 
               g.setColor(Color.green);
               g.fillOval(width,height,40,40);
 
               System.out.println("paintcomponent");
           } //close paintcomponent()
     }  //closeMyDrawPanel()
}  //close MyAnimation()