Following example demonstrates how to display image using getImage() method. It also uses addImage() method of MediaTracker class.
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);
}
}