private void addFileMenu() {
JMenu menu = new JMenu("File");
menu.setMnemonic(KeyEvent.VK_F);
createMenuItemWithControlAccelerator(menu, "Exit", KeyEvent.VK_X, new StopSystemAction(), KeyEvent.VK_Q);
createMenuItemWithControlAccelerator(menu, "Restart", KeyEvent.VK_R, new RestartAction(), KeyEvent.VK_R);
add(menu);
}