cardlayoutdemo.txt

来自「JAVA的一些基础教程」· 文本 代码 · 共 69 行

1: import java.awt.*;
2: import java.awt.event.*;
3: 
4: public class CardLayoutDemo implements ActionListener {
5:   Panel p1, p2, p3, p4;
6:   int i = 1;
7:   Frame f;
8: 
9:   public CardLayoutDemo() {
10:     f = new Frame("cardLayoutDemo");
11:     f.setLayout(new GridLayout(2, 1));
12:     p1 = new Panel();
13:     Button b = new Button("change card");
14:     b.addActionListener(this);
15:     p1.add(b);
16:     f.add(p1);
17: 
18:     p2 = new Panel();
19:     //p2中设置组件
20:     p2.setLayout(new FlowLayout());
21:     p2.add(new Button("first"));
22:     p2.add(new Button("second"));
23:     p2.add(new Button("third"));
24:     p3 = new Panel();
25:     //p3中设置组件
26:     p3.setLayout(new GridLayout(3, 1));
27:     p3.add(new Button("fourth"));
28:     p3.add(new Button("fifth"));
29:     p3.add(new Button("sixth"));
30:     p4 = new Panel();
31:     //p4中设置组件
32:     p4.setLayout(new CardLayout());
33:     p4.add("one", p2);
34:     p4.add("two", p3);
35:     ( (CardLayout) p4.getLayout()).show(p4, "one");
36:     f.add(p4);
37:     f.pack();
38:     f.setVisible(true);
39: 
40:     f.addWindowListener(new WindowAdapter() {
41:       public void windowClosing(WindowEvent e) {
42:         System.exit(0);
43:       }
44:     });
45: 
46:   }
47: 
48:   public void actionPerformed(ActionEvent event) {
49:     switch (i) {
50:       case 1:
51:         ( (CardLayout) p4.getLayout()).show(p4, "two");
52:         break;
53:       case 2:
54:         ( (CardLayout) p4.getLayout()).show(p4, "one");
55:         break;
56:     }
57:     i++;
58:     if (i == 3) {
59:       i = 1;
60:     }
61:     f.validate();
62:   }
63: 
64:   public static void main(String args[]) {
65:     new CardLayoutDemo();
66:   }
67: 
68: }