1 import java.awt.*;
  2 import java.util.Random;
  3 import javax.swing.Timer;
  4 import java.awt.event.*; 
  5 public class PinBall 
  6 {
  7     private Frame f=new Frame("弹球游戏");
  8     Random rand=new Random();
  9     //桌面的宽度以及高度
 10     private final int TABLE_WIDTH=300;
 11     private final int TABLE_HEIGHT=400;
 12     //球拍的宽度以及高度以及水平位置、垂直位置
 13     private final int RACKET_WIDTH=60;
 14     private final int RACKET_HEIGHT=20;
 15     private int racketX=rand.nextInt(24)*10;
 16     private int racketY=300;
 17     //小球的大小、运行速度、坐标
 18     private final int BALL_SIZE=16;
 19     private int ySpeed=1;
 20     private double xyRate=1;
 21     private int xSpeed=(int)(xyRate*ySpeed);
 22     private int ballX=rand.nextInt(284);
 23     private int ballY=1;
 24     //创建画布
 25     private MyCanvas tableArea=new MyCanvas();
 26     //定义时间类
 27     Timer timer;
 28     //游戏是否结束的旗标
 29     private boolean isLose=false;
 30     //设置游戏等级
 31     private int time_times=1;
 32     public void init(){
 33         tableArea.setPreferredSize(new Dimension(TABLE_WIDTH,TABLE_HEIGHT));
 34         f.add(tableArea);
 35         //定义键盘监听器
 36         KeyAdapter keyProcessor=new KeyAdapter()
 37         {
 38             public void keyPressed(KeyEvent ke){
 39                 if(ke.getKeyCode()==KeyEvent.VK_LEFT){
 40                     if(racketX>0)
 41                         racketX-=10;
 42                 }
 43                 if(ke.getKeyCode()==KeyEvent.VK_RIGHT){
 44                     if(racketX<TABLE_WIDTH-RACKET_WIDTH)
 45                         racketX+=10;
 46                 }
 47             }
 48 
 49         };
 50         f.addKeyListener(keyProcessor);
 51         //tableArea.addKeyListener(keyProcessor);
 52         ActionListener taskPerformer=evt->
 53         {
 54             //小球碰到左边框或右边框
 55             if(ballX<=0||ballX>=TABLE_WIDTH-BALL_SIZE){
 56                 xSpeed=-xSpeed;
 57             }
 58             if(ballY>racketY-BALL_SIZE&&(ballX<racketX||ballX>racketX+RACKET_WIDTH-BALL_SIZE)){
 59                 timer.stop();
 60                 isLose=true;
 61                 tableArea.repaint();
 62             }else if(ballY<=0||(ballY>=racketY-BALL_SIZE&&ballX>racketX&&ballX<=racketX+RACKET_WIDTH)){
 63                 ySpeed=-ySpeed;
 64             }
 65             ballY+=ySpeed;
 66             ballX+=xSpeed;
 67             tableArea.repaint();
 68             if((xSpeed<10&&xSpeed>-10)&&(ySpeed<10&&ySpeed>-10)){
 69                 time_times++;
 70             }
 71             if(time_times==10){
 72                 if(xSpeed>0){
 73                     xSpeed++;
 74                 }else{
 75                     xSpeed--;
 76                 }
 77                 if(ySpeed>0){
 78                     ySpeed++;
 79                 }else{
 80                     ySpeed--;
 81                 }
 82                 time_times-=10;
 83                 System.out.println(xSpeed+" "+ySpeed);
 84             }
 85         };
 86         timer=new Timer(100,taskPerformer);
 87         timer.start();
 88         f.pack();
 89         f.setVisible(true);
 90     }
 91     class MyCanvas extends Canvas
 92     {
 93         public void paint(Graphics g){
 94             if(isLose){
 95                 g.setColor(new Color(255,0,0));
 96                 g.setFont(new Font("Times",Font.BOLD,30));
 97                 g.drawString("游戏结束",50,200);
 98             }else{
 99                 g.setColor(new Color(240,240,80));
100                 g.fillOval(ballX,ballY,BALL_SIZE,BALL_SIZE);
101                 g.setColor(new Color(80,80,200));
102                 g.fillRect(racketX,racketY,RACKET_WIDTH,RACKET_HEIGHT);
103             }
104         }
105     }
106     public static void main(String[] args) 
107     {
108         new PinBall().init();
109     }
110 }