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 import javax.swing.JFrame;
  9 import javax.swing.JPanel;
 10
 11 public class MyChar {
 12     public static void main(String[] args) {
 13         JFrame w = new JFrame();
 14         w.setSize(600, 800);
 15
 16         MyPanel mp = new MyPanel();
 17         w.add(mp);
 18
 19         Thread t = new Thread(mp);
 20         t.start();
 21
 22         w.addKeyListener(mp);
 23         mp.addKeyListener(mp);
 24
 25         w.setVisible(true);
 26     }
 27 }
 28
 29 class MyPanel extends JPanel implements Runnable , KeyListener {
 30     int x[] = new int[10];
 31     int y[] = new int[10];
 32     char c[] = new char[10];
 33     int score = 1000;
 34     // structure method
 35     MyPanel() {
 36         for(int i = 0; i < 10; i++) {
 37             x[i] = (int)(Math.random() * 580);
 38             y[i] = (int)(Math.random() * 600);
 39             c[i] = (char)(Math.random() * 26 + 97);
 40         }
 41     }
 42     public void paint(Graphics g) {
 43         super.paint(g);
 44         for(int i = 0; i < 10; i++) {
 45             g.setColor(Color.BLUE);
 46             g.drawString(new Character(c[i]).toString(), x[i], y[i]);
 47         }
 48         g.setColor(Color.RED);
 49         g.drawString("你的成绩是：" + score, 5, 15);
 50     }
 51     // 利用线程的repaint方法，让字母由上至下滑落
 52     public void run() {
 53         while(true) {
 54             for(int i = 0; i < 10; i++) {
 55                 y[i]++;
 56                 // 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
 57                 if(y[i] > 700) {
 58                     y[i] = 0;
 59                     x[i] = (int)(Math.random() * 550);
 60                     c[i] = (char)(Math.random() * 26 + 97);
 61                     score -= 100;
 62                 }
 63             }
 64             try {
 65                 Thread.sleep(30);
 66             } catch(Exception e) {
 67
 68             }
 69             repaint();
 70         }
 71     }
 72     @Override
 73     public void keyPressed(KeyEvent arg0) {
 74         // 将用户输入的字符存入keyC中
 75         char keyC = arg0.getKeyChar();
 76         int nowY = -1;
 77         int nowIndex = -1;
 78         // 扫描整个数组，看有没有匹配的字符
 79         for(int i = 0; i < 10; i++) {
 80             if(keyC == c[i]) { // 如果匹配（可能同时匹配多个）
 81                 if(y[i] > nowY) { // 从0-9扫描索引，寻找最大的y坐标
 82                     // 若发现更大的y坐标，则将该坐标值赋给nowY，直至nowY => y[i]
 83                     nowY = y[i];
 84                     nowIndex = i;
 85                 }
 86             }
 87         }
 88         // 消除最底下的匹配字母并从顶部重新生成随机字母
 89         if(nowIndex != -1) {
 90             y[nowIndex] = 0;
 91             x[nowIndex] = (int)(Math.random() * 580);
 92             c[nowIndex] = (char)(Math.random() * 26 + 97);
 93             score += 10;
 94         } else { //
 95                 score -= 100;
 96             }
 97     }
 98     @Override
 99     public void keyTyped(KeyEvent e) {
100         // TODO Auto-generated method stub
101
102     }
103     @Override
104     public void keyReleased(KeyEvent e) {
105         // TODO Auto-generated method stub
106
107     }
108 }