Java AWT CardLayout move to next component

import java.awt.Container;
import javax.swing.JFrame;
import java.awt.CardLayout;
import javax.swing.JPanel;
import javax.swing.JButton;
import java.awt.Dimension;
import java.awt.BorderLayout;

public class Main {
    public static void main(String[] args) {
        JFrame frame = new JFrame("CardLayout Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container contentPane = frame.getContentPane();

        // Add a Next JButton in a JPanel to the content pane
        JPanel buttonPanel = new JPanel();
        JButton nextButton = new JButton("Next");
        buttonPanel.add(nextButton);//ww  w .  j a  v  a 2 s . co m
        contentPane.add(buttonPanel, BorderLayout.SOUTH);

        // Create a JPanel and set its layout to CardLayout
        final JPanel cardPanel = new JPanel();
        final CardLayout cardLayout = new CardLayout();
        cardPanel.setLayout(cardLayout);

        // Add five JButtons as cards to the cardPanel
        for (int i = 1; i <= 5; i++) {
            JButton card = new JButton("Card " + i);
            card.setPreferredSize(new Dimension(200, 200));
            String cardName = "card" + 1;
            cardPanel.add(card, cardName);
        }

        // Add the cardPanel to the content pane
        contentPane.add(cardPanel, BorderLayout.CENTER);

        // Add an action listener to the Next button
        nextButton.addActionListener(e -> cardLayout.next(cardPanel));

        frame.pack();
        frame.setVisible(true);
    }
}