单击Jbutton后更改JPanel

时间:2016-04-27 05:19:30

标签: java swing jbutton layout-manager cardlayout

我的代码中有2个JPanel。第一个是Furutsu7,它是包含我的游戏的主要JPanel。第二个JPanel是Jbutton的开始。我想要完成的是在用户点击Jbutton之后,将出现Furutsu7 JPanel。

这是我创建按钮时的安装程序。

public void setup(){
    JFrame f = new JFrame("Start ");
    JPanel card1 = new JPanel();
    JPanel card2 = new JPanel();


    cards = new JPanel(new CardLayout());

    JButton Card1Button = new JButton("Start");
    card1.add(Card1Button);
    JButton Card2Button = new JButton("Exit");
    card2.add(Card2Button);

    cards.add(card1, "C1");
    cards.add(card2, "C2");

    f.add(cards, BorderLayout.CENTER);

    f.setTitle("Furutsu");
    f.setSize(500, 300);
    f.setLocationRelativeTo(null);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);



 }

我需要帮助的是,为了切换到Furutsu JPanel,我应该采取什么行动。

public void actionPerformed(ActionEvent e) {


}

1 个答案:

答案 0 :(得分:5)

让您的CardLayout成为该类的一个字段,以便您可以在actionPerformed方法中更轻松地获取它。否则你需要致电(CardLayout) cards.getLayout(),这是一件风险更高的事情。例如:

public class MyClass implements ActionListener {
    private CardLayout cardLayout = new CardLayout();
    private JPanel cards = new JPanel(cardLayout);

    public void setup(){
        JFrame f = new JFrame("Start ");
        JPanel card1 = new JPanel();
        JPanel card2 = new JPanel();

        // cards = new JPanel(new CardLayout());

        JButton Card1Button = new JButton("Start");
        card1.add(Card1Button);
        JButton Card2Button = new JButton("Exit");
        card2.add(Card2Button);

        cards.add(card1, "C1");
        cards.add(card2, "C2");

        f.add(cards, BorderLayout.CENTER);

        f.setTitle("Furutsu");
        f.setSize(500, 300);
        f.setLocationRelativeTo(null);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
    }

然后你可以直接引用它:

@Override
public void actionPerformed(ActionEvent e) {
    // now you can call methods on your cardLayout variable:
    cardLayout.show(...);  // I'll leave it to you to figure out what to put in here
}

有关CardLayout的更多信息,请查看其tutorial

请注意,如果您只想按正向或反向顺序交换组件,请查看CardLayout的其他方法,例如next(cards)previous(cards)