1 package com.java7.mysnow.main; 2 import java.awt.*; 3  4 public class MySnow { 5     public static void main(String[] args) { 6         Frame w = new Frame(); 7         w.setSize(1024, 768); 8         w.setBackground(new Color(205,240,253)); 9 10         MyPanel mp = new MyPanel();11         w.add(mp);12 13         Thread t = new Thread(mp);14         t.start();15 16         w.show();17     }18 }19 20 class MyPanel extends Panel implements Runnable {21     int x[] = new int[300];22     int y[] = new int[300];23     int fx[] = new int[300];24     int fy[] = new int[300];25 26     // 构造方法27     public MyPanel() {28         for(int i = 0; i < 300; i++) {29             x[i] = (int)(Math.random() * 1024);30             y[i] = (int)(Math.random() * 768);31             fx[i] = (int)(Math.random() * 30);32             fy[i] = (int)(Math.random() * 30);33         }34     }35     public void paint(Graphics g) {36         g.setColor(Color.WHITE);37         for(int i = 0; i < 300; i++) {38             g.setFont(new Font("", fx[i], fy[i]));39             g.drawString(".", x[i], y[i]);40         }41     }42     public void run() {43         while(true) {44             try {45                 for(int i = 0; i < 300; i++) {46                     y[i]++;47                     if(y[i] > 768) {48                         y[i] = 0;49                     }50                 }51                 Thread.sleep(25);52             } catch (Exception e) {53                 54             }55             repaint();56         }57     }58 }