使用java简单实现桌球的滚动

ゞ浴缸里的玫瑰 2023-06-10 09:25 82阅读 0赞

package pers.javacode.lzw.ballgame;
    
    import java.awt.Graphics;
    import java.awt.Image;
    import java.awt.Toolkit;
    
    import javax.swing.JFrame;
    
    public class BallGame extends JFrame {
        
    	 //加载图片
    	Image ball=Toolkit.getDefaultToolkit().getImage("images/ball.png");
    	 Image desk=Toolkit.getDefaultToolkit().getImage("images/desk.jpg");
    	 
    	  public  void frameLunch()
    	  {
        
    		  this.setSize(856,500);
    		  this.setLocation(50,50);
    		  this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		  this.setVisible(true);
    		  while(true)
    		  {
        
    			  repaint();
    			  try {
        
    				Thread.sleep(40);
    			} catch (InterruptedException e) {
        
    				
    				e.printStackTrace();
    			}
    		  }
    		  
    	  }
    	  double x=100;
    	  double  y=100;
    	  double degree=3.14/4;//对应的是60度
    	  public void paint(Graphics g)
    	  {
        
    		  
    		  g.drawImage(desk,0,0,null);
    		  g.drawImage(ball,(int)x,(int)y,null);
    		  //创建动态的小球滚动的状态
    		  x  =  (x+ 10*Math.cos(degree));
    	        y  = y +10*Math.sin(degree); 
    	         
    	        //碰到上下边界
    	        if(y>500-40-30||y<40+40){
        //500是窗口高度；40是桌子边框，30是球直径；最后一个40是标题栏的高度
    	            degree = -degree;
    	        }
    	         
    	        //碰到左右边界
    	        if(x<40||x>856-40-30){
        
    	            degree = 3.14 - degree;
    	        }
    		  
    		  
    	  }
    	  public static void main(String[] args) {
        
    		 BallGame ba=new BallGame();
    		 ba.setTitle("Ball Game");
    		 ba.frameLunch();
    	}
    
    	
    }

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