练习.打字母游戏

  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     @Override
101     public void keyReleased(KeyEvent e) {
102         // TODO Auto-generated method stub
103         
104     }
105 }