public void update(){
menu.repaint();
menu.updateUI();
menu.validate();
setJMenuBar(menu);
}
private MyMenu menu = new MyMenu();
public void create() {
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setBounds((int)new Screen().getCenterPos().getHeight(),
(int)new Screen().getCenterPos().getWidth(), new Screen().Size.getHeight(),
new Screen().Size.getWidth());
setTitle("app");
setJMenuBar(menu);