if (present) {

      if (platform == MACOSX) {

        // Call some native code to remove the menu bar on OS X. Not necessary

        // on Linux and Windows, who are happy to make full screen windows.

      System.out.println("Enter fullscreen MAC OSX");

      JAppleMenuBar japplemenubar;

      japplemenubar = new JAppleMenuBar();

      japplemenubar.setVisible(false);

      }

Now I have fullscreen no menu bar.