The Quintessential Applet
Every applet must subclass Applet. 

 import java.applet.*;
 import java.awt.*;
     
 public class BasicApplet extends Applet {
   public void init() {
     // Called once by the browser when 
     // it starts the applet.
   }
   public void start() {
     // Called whenever the page containing 
     // this applet is made visible.
   }
   public void stop() {
     // Called whenever the page containing this 
     // applet is not visible.
   }
   public void destroyed() {
     // Called once when the browser destroys 
     // this applet.
   }
   public void paint(Graphics g) {
     // Called whenever this applet needs to 
     // repaint itself.
   }
 }