JFrame frame = new JFrame();

public Launcher(int id) {
    try {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (Exception e) {
        e.printStackTrace();
    }
    frame.setUndecorated(true);
    frame.setTitle("Launcher");
    frame.setSize(new Dimension(width, height));
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(this);
    frame.setLocationRelativeTo(null);
    frame.setResizable(false);
    frame.setVisible(true);
    window.setLayout(null);

if (Input.Clicked == 1) {
    config.loadConfig("res/Config/config.xml");
    frame.dispose();
    new NewLauncher();

}

public NewLauncher() {

    Display app = new Display();
    JFrame frame = new JFrame();
    frame.add(app);
    frame.setSize(Display.getGameWidth(), Display.getGameHeight());
    frame.getContentPane();
    frame.setTitle(Display.TITLE);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
    frame.setResizable(false);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    game.start();
    stopMenuThread();
}

public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable()
    {
       public void run()
       {
        new Launcher(0);
       }
    });
    //new Launcher(0);
}

EventQueue.invokeLater(new Runnable() {
 // Run your code here ...
});