/* Create and show the graphical user interface. */ private static void createAndShowGUI() { JFrame frame = new JFrame("My Collapsing Puzzle"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Game game = new Game(); frame.setJMenuBar(game.createMenuBar()); frame.setContentPane(game.createContentPane()); frame.setSize(game.getGameSize()); frame.setVisible(true); }