Display image using Applet in java pgm

Display image using Applet

import java.applet.*;

import java.awt.*;          

public class appletImage extends Applet

  {

   Image img;

   MediaTracker tr;

   public void paint(Graphics g)

  {

      tr = new MediaTracker(this);

      img = getImage(getCodeBase(), "demoimg.gif");

      tr.addImage(img,0);

      g.drawImage(img, 0, 0, this);

   }

}