如何使用 Java 中的 CardLayout 根据组合框选择动态交换 UI 内容？

<code class="java">import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CardPanelExample {

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Create two panels to be swapped
        JPanel panel1 = new JPanel();
        panel1.setBackground(Color.CYAN);
        JPanel panel2 = new JPanel();
        panel2.setBackground(Color.ORANGE);

        // Create a CardLayout and add the panels
        CardLayout cardLayout = new CardLayout();
        JPanel cardPanel = new JPanel(cardLayout);
        cardPanel.add(panel1, "Panel1");
        cardPanel.add(panel2, "Panel2");

        // Create a combo box and add items
        JComboBox<String> comboBox = new JComboBox<>();
        comboBox.addItem("Panel1");
        comboBox.addItem("Panel2");

        // Add an action listener to the combo box
        comboBox.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                cardLayout.show(cardPanel, comboBox.getSelectedItem().toString());
            }
        });

        // Add the card panel and combo box to the frame
        frame.add(cardPanel, BorderLayout.CENTER);
        frame.add(comboBox, BorderLayout.SOUTH);
        frame.setSize(400, 300);
        frame.setVisible(true);
    }
}</code>