package day06;import javax.swing.JFrame;public class BallFrame {public BallFrame(){JFrame frame = new JFrame();frame.setTitle("弹球游戏");frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);frame.setBounds(100,200,800,600);frame.setVisible(true);BallPanel bp = new BallPanel();frame.add(bp);frame.setVisible(true);}public static void main(String[] args) {new BallFrame();}}package day06;import java.awt.Color;import java.awt.Graphics;import java.awt.event.MouseEvent;import java.awt.event.MouseMotionListener;import javax.swing.JPanel;public class BallPanel extends JPanel implements MouseMotionListener {final static int RIIGHT_DOWN = 0;final static int LEFT_DOWN=1;final static int LEFT_UP =2;final static int RIGHT_UP=3;int f=0;int speed = 10;int bx=0;int by=0;int dx=100;int dy=400;public BallPanel(){move();addMouseMotionListener(this);}public void paint(Graphics g){super.paint(g);setBackground(Color.black);g.setColor(Color.yellow);g.fillOval(bx, by,20, 20);g.setColor(Color.blue);g.fillRect(dx, dy, 100, 20);}public void move(){new Thread(){public void run(){while(true){if(f==0){bx+=speed;by+=speed;}if(f==1){bx-=speed;by+=speed;}if(f==2){bx-=speed;by-=speed;}if(f==3){bx+=speed;by-=speed;}if(bx>800-20){if(f==0){f=1;}else{f=2;}}if(by>600-20){if(f==1){f=2;}else{f=3;}		}if(bx<0){if(f==1){f=0;}else{f=3;}}if(by<0){if(f==2){f=1;}else{f=0;}}if (by >= 400 - 20) {if (bx >= dx && bx <= dx + 100) {speed++;} else {Thread.currentThread().stop();}if (speed >= 20){speed = 20;}if (f == 1) {f = 2;} else {f = 3;}}repaint();try {Thread.sleep(100);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}.start();}@Overridepublic void mouseDragged(MouseEvent e) {// TODO Auto-generated method stub}@Overridepublic void mouseMoved(MouseEvent e) {// TODO Auto-generated method stubdx = e.getX()-100/2;}}

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