void unlaunch(){
  if (server != null) {
    server.die();
    server=null;
  }
  frame.setVisible(true);
  client=null;
  System.gc();
  System.runFinalization();
}

void unlaunch ( ) { if ( server != null ) { server . die ( ) ; server = null ; } frame . setVisible ( true ) ; client = null ; System . gc ( ) ; System . runFinalization ( ) ; }
un - hides the main menu and tries to clean up the client or server .
