How to access images in a jar file

Hello,
I am currently developping a swing application that uses icons (gif files) and I have zipped all my classes and images in a single .jar file.
When I try to access those files it doesn't work ... it seems that I am not using the right way ...
Could anyone explain me how to achieve this ?
thanks in advance

I get the Images from jar file to set ImageIcon for my components like this:
ImagesLocator.getImage("imageName.gif");
anu
//ImagesLocator.java
import java.net.URL;
import java.awt.*;
import javax.swing.*;
* Load images from correct place (directory or JAR file) into GUI.
public class ImagesLocator
     * Load image from correct place (directory or JAR file).
     * @param imageName name of image to be loaded (with no path)
     * @return loaded image
     public static ImageIcon getImage(String imageName)
          ClassLoader cl = ImagesLocator.class.getClassLoader();
          ImageIcon i = new ImageIcon(cl.getResource(imageName));
          return i;

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