Java中CardLayout布局方式的应用

import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Container;

import javax.swing.JButton;
import javax.swing.JFrame;

public class CardLayoutDemo {
    public static void main(String[] args) {
        //新建一个JFrame框架
        JFrame frame = new JFrame("CardLayout");
        frame.setSize(600, 400);
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        
        final Container cp = frame.getContentPane();//得到一个内容面板；final标记的为常量，只能赋值一次
        final CardLayout cardlayout = new CardLayout();//因为后期会对layout进行操作，才将其单独定义出来
        cp.setLayout(cardlayout);//cp.setLayout(new CardLayout())的方式不可行，会出现异常
        Color[] colors = { Color.white, Color.GRAY, Color.PINK, Color.cyan };

        for (int i = 0; i < colors.length; i++) {
            String name = "card" + String.valueOf(i + 1);
            JButton button = new JButton(name);
            button.setBackground(colors[i]);
            cp.add(name, button);
        }

        frame.setVisible(true);
        /**
         * 要点是创建线程时，要重写Thread类中的run方法
         */
        Thread thread = new Thread() {
            public void run() {
                while (true) {
                    try {
                        Thread.sleep(400);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    /**
                     * cardLayout的next是另外一个内容面板
                     */
                    cardlayout.next(cp);
                }
            }
        };
        thread.start();//启动线程
    }
}