飞行的小球

最新推荐文章于 2022-04-18 21:17:59 发布

原创最新推荐文章于 2022-04-18 21:17:59 发布 · 288 阅读

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import java.awt.*;
public class MyBall {
    public static void main(String args[]){
    	Frame w=new Frame();
    	w.setSize(300, 400);
    	MyPanel mp=new MyPanel();
    	w.add(mp);
    	Thread t=new Thread(mp);   
    	t.start();
    	w.setVisible(true);
    }
}
class MyPanel extends Panel implements Runnable{
	int x=30;
	int y=30;
	public void paint(Graphics g){
		g.fillOval(x, y, 20, 20);
	}
	public void run(){
			while(true){		
				y++;
				if(y>400){
					y=0;
				}
				try{
					Thread.sleep(30);		
				}catch(Exception e){}
				repaint();
			}
		
	}
		
	
}