Could not find the main class in Eclipse

Question

Hey,
I've been working with Java for a few years now, but I recently set-up a new Eclipse-environment and now my Application won't run...
"Could not find the main class. Program will exit."
If I compile and run the source myself it works fine, so it must be a setting in Eclipse somewhere...
It doesn't work, even when I put the class in the default package...
It must be something very stupid, but I can't seem to find out what the problem is :(

Answer 1

It was only the basic Hello-World-concept;
public class Game extends JFrame {
     /** A default SerialVersionUID */
     private static final long serialVersionUID = 1L;
     public Game() {
          addKeyListener(new GameController());
          MainView view = new MainView(...);
          add(view);
      * @param args The game-options
     public static void main(String[] args) {
          Game spel = new Game();
          spel.setSize(1024, 768);
          spel.setTitle("Java Rally");
          spel.setResizable(false);
          spel.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          spel.setVisible(true);
}