1 package com.java7.mychar.main;  2 import java.awt.Color;  3 import java.awt.Frame;  4 import java.awt.Graphics;  5 import java.awt.Panel;  6 import java.awt.event.KeyEvent;  7 import java.awt.event.KeyListener;  8   9 public class MyChar { 10     public static void main(String[] args) { 11         Frame w = new Frame(); 12         w.setSize(600, 800); 13          14         MyPanel mp = new MyPanel(); 15         w.add(mp); 16          17         Thread t = new Thread(mp); 18         t.start(); 19          20         w.addKeyListener(mp); 21         mp.addKeyListener(mp); 22          23         w.show(); 24     } 25 } 26  27 class MyPanel extends Panel implements Runnable , KeyListener { 28     int x[] = new int[10]; 29     int y[] = new int[10]; 30     char c[] = new char[10]; 31     int score = 1000; 32     // structure method 33     MyPanel() { 34         for(int i = 0; i < 10; i++) { 35             x[i] = (int)(Math.random() * 580); 36             y[i] = (int)(Math.random() * 600); 37             c[i] = (char)(Math.random() * 26 + 97); 38         } 39     } 40     public void paint(Graphics g) { 41         for(int i = 0; i < 10; i++) { 42             g.setColor(Color.BLUE); 43             g.drawString(new Character(c[i]).toString(), x[i], y[i]); 44         } 45         g.setColor(Color.RED); 46         g.drawString("你的成绩是：" + score, 5, 15); 47     } 48     // 利用线程的repaint方法，让字母由上至下滑落 49     public void run() { 50         while(true) { 51             for(int i = 0; i < 10; i++) { 52                 y[i]++; 53                 // 如字母滑到底部没有被消除，则重新回到顶部生成随机字母，并扣100分 54                 if(y[i] > 700) { 55                     y[i] = 0; 56                     x[i] = (int)(Math.random() * 550); 57                     c[i] = (char)(Math.random() * 26 + 97); 58                     score -= 100; 59                 } 60             } 61             try { 62                 Thread.sleep(30); 63             } catch(Exception e) { 64                  65             } 66             repaint(); 67         } 68     } 69     @Override 70     public void keyPressed(KeyEvent arg0) { 71         // 将用户输入的字符存入keyC中 72         char keyC = arg0.getKeyChar(); 73         int nowY = -1; 74         int nowIndex = -1; 75         // 扫描整个数组，看有没有匹配的字符 76         for(int i = 0; i < 10; i++) {  77             if(keyC == c[i]) { // 如果匹配（可能同时匹配多个） 78                 if(y[i] > nowY) { // 从0-9扫描索引，寻找最大的y坐标 79                     // 若发现更大的y坐标，则将该坐标值赋给nowY，直至nowY => y[i] 80                     nowY = y[i];  81                     nowIndex = i; 82                 } 83             } 84         } 85         // 消除最底下的匹配字母并从顶部重新生成随机字母 86         if(nowIndex != -1) { 87             y[nowIndex] = 0; 88             x[nowIndex] = (int)(Math.random() * 580); 89             c[nowIndex] = (char)(Math.random() * 26 + 97); 90             score += 10; 91         } else { //  92                 score -= 100; 93             }             94     } 95     @Override 96     public void keyTyped(KeyEvent e) { 97         // TODO Auto-generated method stub 98          99     }100     @Override101     public void keyReleased(KeyEvent e) {102         // TODO Auto-generated method stub103         104     }105 }