Need Help with Importing Image

[Dillinger4]

Each time i refresh firefox i get a new image.

 import java.io.*; 
 import java.awt.*; 
 import java.util.*;
 import javax.swing.*; 

 public class AppletEx extends JApplet{
  private Image image; 
  private String[] filenames; 
  private File imgdir; 
  private int dirlength; 
  private Random r;
  private int imageindex;
  
  public void init(){
   imgdir = new File("C:\\Pics");
   filenames = imgdir.list(); 
   dirlength = filenames.length; 
   r = new Random(); 
   imageindex = r.nextInt(dirlength);
   image = Toolkit.getDefaultToolkit().getImage(imgdir.getPath() + "//" + filenames[imageindex]); 
  }
  public void paint(Graphics gfx){
   gfx.drawImage(image,50,50,this);
  }
 }