🚀 go-pugleaf

Can someone tell me why this code produces this error?

"Warning:source c:\JBuilder\myprojects\HW1\ImageTestAppletSimple.java
cannot be found on sourcepath by appending \ImageTestAppletSimple.java
to each sourcepath entry; verify sourcepath "

import java.net.URL;
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Image;

public class ImageTestAppletSimple extends Applet {
       private Image im;

       public void init() {
              URL codebase = getCodeBase();
              System.out.println(codebase);
              im = getImage(codebase, "saint.gif");
              showImageSize();
       }
       public void paint (Graphics g) {
              g.drawImage (im,0,0,this);
       }
       private void showImageSize() {
               System.out.print ("Image width=" + im.getWidth(this));
               System.out.println(" height=" +im.getHeight(this));
               }
       }