Including images in jar executable files. Using images in jar files.

Question

Does anybody know what is the reason of my problem??
I created a package called test in my eclipse env. and in that package I placed folder named graph in which there is a file Help.png.
Here is all the code I run in eclipse and it runs properly. When I create a jar file (using eclipse wizard) to execute without eclipse it can not execute and shows nothing (process starts and I have to kill it by myself in OS). Maybe there is some mistake with making jar... I do not know
So let someone try tu run my class or build jar file and try to execute and share his observations (solutions) ??
package test;
import java.awt.Toolkit;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.UIManager;
public class TestWindow extends JFrame {
     private JButton jButton1 = new JButton(new JARImage().getImage("Help.png"));
     public TestWindow() {
          this.getContentPane().add(jButton1);
          this.validate();
          this.setVisible(true);
     private class JARImage {
          protected ImageIcon getImage(String imageName) {
               ImageIcon image = new ImageIcon();
               try {
                    image.setImage((Toolkit.getDefaultToolkit().getImage(getClass()
                              .getResource("graph/" + imageName))));
               } catch (Exception ex) {
                    System.out.println("Image Error: " + ex);
                    ex.printStackTrace();
               return image;
     public static void main(String[] args) {
          try {
               UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
          } catch (Exception e) {
               e.printStackTrace();
          new TestWindow();
}

Answer 1

Uncaught error fetching image:
java.lang.NullPointerException
     at sun.awt.image.URLImageSource.getConnection(Unknown Source)
     at sun.awt.image.URLImageSource.getDecoder(Unknown Source)
     at sun.awt.image.InputStreamImageSource.doFetch(Unknown Source)
     at sun.awt.image.ImageFetcher.fetchloop(Unknown Source)
     at sun.awt.image.ImageFetcher.run(Unknown Source)