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
     }
 }