//SpinBall.java
//Demonstrates animation loop
//Andy Harris, 06/00

import java.awt.*;
import java.applet.*;

public class SpinBall extends Applet implements Runnable {

  Image ball[] = new Image[6];
  Thread looper;
  int counter = 1;
  boolean keepGoing = true;
  
  public void init(){
    ball[1] = getImage(getCodeBase(), "jball1.gif");
    ball[2] = getImage(getCodeBase(), "jball2.gif");
    ball[3] = getImage(getCodeBase(), "jball3.gif");
    ball[4] = getImage(getCodeBase(), "jball4.gif");
    ball[5] = getImage(getCodeBase(), "jball5.gif");
  } // end init

  public void start(){
    if (looper == null){
      looper = new Thread(this);
      keepGoing = true;
      looper.start();
    } // end if
  } // end start

  public void stop(){
    keepGoing = false;
    looper = null;
  } // end stop

  public void run(){
    while(keepGoing){
      try {
        looper.sleep(250);
      } catch (InterruptedException exc){
        System.out.println(exc.getMessage());
      } // end try
  
      counter++;
      if (counter > 5){
        counter = 1;
      } // end if
      repaint();
    } // end while
  } // end run

  public void paint(Graphics g){
    g.drawImage(ball[counter], 10, 10, this);
  } // end paint

} // end class def