java卡片布局管理器简单应用

很久以前学java写的一个题目，内容仅供参考，转发请附带原地址。

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class CardLayoutTest extends JFrame implements ActionListener {
    // 卡片布局管理器
    private CardLayout cardLayout;
    // 使用卡片布局管理器的面板
    private JPanel cardpanel;
     Button nextButton;
     Button preButton;
    public CardLayoutTest() {
        cardLayout = new CardLayout(10,10);
        JPanel cardpanel = new JPanel(cardLayout);
        setTitle("CardLayoutTest");
        setSize(300, 200);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        JPanel p1 = new JPanel();
        JPanel p2 = new JPanel();
        JPanel p3 = new JPanel();
        JPanel p4 = new JPanel();
        p1.add(new Label("The First Card",Label.CENTER));
        p1.setBackground(Color.yellow);
        cardpanel.add(p1);
        p2.add(new Label("The Second Card",Label.CENTER));
        p2.setBackground(Color.green);
        cardpanel.add(p2);
        p3.add(new Label("The Third Card",Label.CENTER));
        p3.setBackground(Color.magenta);
        cardpanel.add(p3);
        p4.add(new Label("The Fourth Card",Label.CENTER));
        p4.setBackground(Color.cyan);
        cardpanel.add(p4);
        JPanel btn = new JPanel(new GridLayout(1,2));
        JButton prebutton = new JButton("上一张");
        JButton nextbutton = new JButton("下一张");
        btn.add(prebutton);
        btn.add(nextbutton);
        nextbutton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                cardLayout.next(cardpanel);
            }
        }); // 注册按钮事件监听器
        prebutton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                cardLayout.previous(cardpanel);
            }
        }); // 注册按钮事件监听器
        this.add(btn, BorderLayout.SOUTH);
        /* 创建使用CardLayout布局管理器的容器 */
        // 将使用了CardLayout的面板添加到窗体中显示
        this.add(cardpanel, BorderLayout.CENTER);
        setVisible(true);
    }

    public static void main(String[] args) {
        new CardLayoutTest();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
    }
}

运行界面