练习.繁星点点

 1 package com.java7.mystarandmoon.main;
 2 import java.awt.*;
 3 import javax.swing.JFrame;
 4 import javax.swing.JPanel;
 5 
 6 
 7 public class MyStarAndMoon {
 8     public static void main(String[] args) {
 9         JFrame w = new JFrame();
10         
11         w.setTitle("MyStarAndMoon");
12         w.setSize(1024, 768);
13         
14         MyPanel mp = new MyPanel();
15         w.add(mp);
16         
17         Thread t = new Thread(mp);
18         t.start();
19         
20         w.setVisible(true);
21         
22         
23     }
24 }
25 
26 @SuppressWarnings("serial")
27 class MyPanel extends JPanel implements Runnable {
28     int x[] = new int[300];
29     int y[] = new int[300];
30     int fx[] = new int[300];
31     int fy[] = new int[300];
32     
33     public MyPanel() {
34         for(int i = 0; i < 300; i++) {
35             x[i] = (int)(Math.random() * 1024);
36             y[i] = (int)(Math.random() * 768);
37         }
38     }
39     public void paint(Graphics g) {
40         super.paint(g);
41         this.setBackground(Color.BLACK);
42         for (int i = 0; i < 100; i++) {
43             g.setColor(Color.YELLOW);
44             g.setFont(new Font("", (int)(Math.random() * 15), (int)(Math.random() * 15)));
45             g.drawString(".", x[i], y[i]);            
46         }
47         g.setColor(Color.WHITE);
48         g.drawOval(30, 30, 100, 100);
49         g.fillOval(30, 30, 100, 100);
50         g.setColor(Color.BLACK);
51         g.drawOval(50, 30, 100, 100);
52         g.fillOval(50, 30, 100, 100);
53     }
54     public void run() {
55         while(true) {
56             try {
57                 Thread.sleep(40);
58             } catch (Exception e) {
59                 
60             }
61             repaint();
62         }
63     }
64 }