java - JMenu 添加菜单监听器

Question

I want to use Jmenu as buttons to change what is showed in the frame but when the menu is selected the selection is not released. 下面是 Jmenu 实例的代码，它改变了两个字段和标签的位置。

mnAddUser.addMenuListener(new MenuListener() {

            @Override
            public void menuSelected(MenuEvent e) {
                // TODO Auto-generated method stub

                lblUserId.setBounds(150, 86, 111, 30);
                userIDField.setBounds(273, 80, 268, 43);    

                lblUserName.setBounds(150, 165, 111, 30);
                userNameField.setBounds(273, 159, 268, 43);

                lblUserName.setVisible(true);
                userNameField.setVisible(true);

                btnAddUser.setBounds(187, 235, 150, 43);
                btnReset.setBounds(390, 235, 150, 43);

                btnAddUser.setText("Add User");
            }

            @Override
            public void menuDeselected(MenuEvent e) {
                // TODO Auto-generated method stub

            }

            @Override
            public void menuCanceled(MenuEvent e) {
                // TODO Auto-generated method stub

            }           

        });

Answer 1

• 也许没有理由使用添加到 JMenuBar 并由 MenuListener 监听的 JMenu

• 将JButtons 添加到 JMenuBar很简单，也许可以使用JButton.setFocusable(false);