Could not find the main class. Program will exit. Manifest error?

Question

Hello
Im trying to export my project from eclipse to a jar.
The error comes from main..
     public static void main(String[]args){
          try {
               // first tell SkinLF which theme to use
               Skin theSkinToUse = SkinLookAndFeel.loadThemePack("tigerthemepack.zip");
               SkinLookAndFeel.setSkin(theSkinToUse);
               // finally set the Skin Look And Feel
               UIManager.setLookAndFeel(new SkinLookAndFeel());
               System.out.println("Skin loaded");
          } catch (Exception e) {
               // take an appropriate action here
               JOptionPane.showMessageDialog(null,e.getMessage());
          new testGUI();
     }Everything works fine without the try catch and everything inside, so that must be the problem.
In the build path in eclipse I have added a external jar called "skinlf.zip".
I also use a zip called "tigetthemepack.zip" but thats not in build path.
Im woundering if all this trouble comes from the manifest:
Manifest-Version: 1.0
Main-Class: presentation.testGUIIm not good with manifest files, ive tried som tutorials but i dont get it, and i realy dont know if thats realy the problem.
Can anyone help me out?
Kind Regards
HV

Answer 1

Now I have created a completly new project just to show my example.
Enitire program code:
import javax.swing.JOptionPane;
import javax.swing.UIManager;
import com.l2fprod.gui.plaf.skin.Skin;
import com.l2fprod.gui.plaf.skin.SkinLookAndFeel;
public class example {
     public example(){
          JOptionPane.showMessageDialog(null,"Hello World!");
     public static void main(String[] args) {
          try {
               // first tell SkinLF which theme to use
               Skin theSkinToUse = SkinLookAndFeel.loadThemePack("tigerthemepack.zip");
               SkinLookAndFeel.setSkin(theSkinToUse);
               // finally set the Skin Look And Feel
               UIManager.setLookAndFeel(new SkinLookAndFeel());
               System.out.println("Skin loaded");
          } catch (Exception e) {
               // take an appropriate action here
               System.out.println(e.getMessage());
          new example();
}If I extract the jar file, It only contains:
".classpath"
".project"
"example.class"
"META_INF/MANIFEST.MF"
MANIFEST.MF containes:
Manifest-Version: 1.0
Main-Class: example