java - 从 JPanel 读取 JFrame 中的 Action 监听器

Question

在下面的代码中，我想根据位于Panel1和Panel2中的按钮的事件来更改面板.Panel1 仅包含一个按钮，与 Panel2 相同

public class Window extends JFrame {
 public window(){
this.setTitle("CardLayout");
this.setSize(300, 120);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
 Panel2 p2 = new Panel2();
 Panel1 p1 = new Panel1();
 this.getContentPane().add(p1);
 this.setVisible(true);
p2.getButton2().addActionListener(new ActionListener(){
    @Override
    public void actionPerformed(ActionEvent e) {

                // TODO Auto-generated method stub
                Panel1 p1 = new Panel1();
                getContentPane().removeAll();
                getContentPane().add(p1);
                getContentPane().validate();
                getContentPane().repaint();
                System.out.println("change to panel1");

    }   
});
p1.getButton1().addActionListener(new ActionListener(){
    @Override
    public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
            Panel2 p2 = new Panel2();
                getContentPane().removeAll();
                getContentPane().add(p2);
                getContentPane().validate();
                getContentPane().repaint();
                System.out.println("change to panel2");


    }   
});

}}

Answer 1

您可能正在寻找这个

public class testframe extends JFrame {

private JPanel contentPane;
String panel = "Card with JButtons";
String panel2 = "Card with JTextField";
JPanel cards = new JPanel();
JPanel card1 = new JPanel();
JPanel card2 = new JPanel();
/**
 * Create the frame.
 */
public testframe() {
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    contentPane = new JPanel();
    setContentPane(contentPane);  

    cards = new JPanel(new CardLayout());
    card1 = new JPanel();
    card2 = new JPanel();

    JButton b1 = new JButton("button 1");
    b1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            CardLayout cl = (CardLayout)(cards.getLayout());
            cl.show(cards, panel2); 
        }
    });
    card1.add(b1);

    JButton b2 = new JButton("button 2");
    b2.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            CardLayout cl = (CardLayout)(cards.getLayout());
            cl.show(cards, panel);
        }
    });
    card2.add(b2);      

    cards.add(card1, panel);
    cards.add(card2, panel2);



    contentPane.add(cards);

}

如果是这样，这也会有帮助:CardLayout