台球小游戏

package Game;

import  java.awt.*;

import javax.swing.*;

public class Ballgame extends JFrame {//框

	Image ball = Toolkit.getDefaultToolkit().getImage("images/ball.png");
	Image desk=Toolkit.getDefaultToolkit().getImage("images/desk.jpg");
double degree=3.14/3;//弧度
   double x=100;//小球的坐标
   double y=100;
	//画窗口的方法
	public void paint(Graphics  g){
		System.out.println("窗口被画了一次！");
		g.drawImage(desk,0, 0,null);//先画桌面再画球
		g.drawImage(ball, (int)x, (int)y, null);
x=x+10*Math.cos(degree);
y+=10*Math.sin(degree);
if(y>=500-70||y<70){
	degree=-degree;
}
//左右边界
if(x<70||x>796){
	degree=3.14-degree;
}

	}
	
	//窗口加载
	void launchFrame(){
		setSize(856,500);
		setLocation(400,400);
		setVisible(true);
		//重画窗口
		while(true){
			repaint();//调用paint
			try {
				Thread.sleep(80);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	//main方法是程序执行的入口
	public static void main(String[] args){
		System.out.println(" 我是尚学堂高淇，这个游戏项目让大家体验编程的快感，寓教于乐！");
		Ballgame game = new Ballgame();
		game.launchFrame();
	}
	
}