hollowcircle.java

一些基本的java程序源代码

package circledemo;

public class HollowCircle extends AbstractCircle{
	public HollowCircle(){}
	public HollowCircle(double radius){
		this.radius=radius;
	}
	public void render(){
		System.out.printf("画一个半径%f的空心圆\n",getRadius());
	}

}