如何从JPanel中的操作中交换JPanel

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class PanelSwapExample {
    private JPanel container;
    private JPanel panel1;
    private JPanel panel2;

    public PanelSwapExample() {
        container = new JPanel(new CardLayout());
        panel1 = new JPanel();
        panel2 = new JPanel();

        // 在panel1中添加组件和操作
        JButton button = new JButton("切换到panel2");
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // 切换到panel2
                CardLayout cardLayout = (CardLayout) container.getLayout();
                cardLayout.show(container, "panel2");
            }
        });
        panel1.add(button);

        // 在panel2中添加组件和操作
        JButton button2 = new JButton("切换到panel1");
        button2.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // 切换到panel1
                CardLayout cardLayout = (CardLayout) container.getLayout();
                cardLayout.show(container, "panel1");
            }
        });
        panel2.add(button2);

        // 将两个面板添加到容器中
        container.add(panel1, "panel1");
        container.add(panel2, "panel2");
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                PanelSwapExample example = new PanelSwapExample();
                JFrame frame = new JFrame("Panel Swap Example");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.getContentPane().add(example.container);
                frame.pack();
                frame.setVisible(true);
            }
        });
    }
}