/** * 添加文件的子菜单项添加到文件菜单中 */ menuFile = new Menu("文件"); mNew = new MenuItem("新建"); mNew.setShortcut(new MenuShortcut(KeyEvent.VK_N)); mOpen = new MenuItem("打开"); mOpen.setShortcut(new MenuShortcut(KeyEvent.VK_O)); mSave = new MenuItem("保存"); mSave.setShortcut(new MenuShor