1 package test.com;
 2 
 3 import java.awt.GridLayout;
 4 
 5 import javax.swing.*;
 6     /*
 7      * 顯示一個包含9個標簽的框架，標簽有3類圖形。圈、叉和空白
 8      * 每次運行隨機顯示
 9      */
10 public class Game extends JFrame {
11     private ImageIcon x = new ImageIcon("d:\\x.jpg");
12     private ImageIcon o = new ImageIcon("d:\\o.jpg");
 
13     private ImageIcon w = new ImageIcon("d:\\w.jpg");
14     
15     
16     public static void main(String[] args) {
17         Game pictureGame = new Game();
18         pictureGame.setTitle("pictrueGame");
19         pictureGame.setSize(400, 400);
20         pictureGame.setLocationRelativeTo(null);
 
21         pictureGame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
22         pictureGame.setVisible(true);
23         
24         
25     }
26     
27     //創建一個GridLayout布局
28     public Game(){
29         setLayout(new GridLayout(3,3,5,5));
30         this.random();
31     }
32     
33     //隨機顯示的方法
 

34     public void random(){
35         int j = 0;
36         while(j<9){
37             int i = (int) (Math.random()*3);
38             switch(i){
39             case 0 : 
40                 add(new JLabel(o));break;        
41             case 1 : 
42                 add(new JLabel(x));break;
43             case 2 : 
44                 add(new JLabel(w));break;
45             }
46             j++;
47         }
48     }
49 }

小練習。

好像沒有什麽需要註意的東西。

Java語言程序設計 基礎篇 編程練習題 12.7