Java圆形继承Shape

package com.itheima;
/**
 * @author SAMSUNG
 */
public class Circle extends Shape {
	private int radius;
	public void Circle()
	{

	}
	public void Circle(int r)
	{
		this.radius=r;
	}
	@Override
    public double  getArea()
	{
		return 3.14*this.radius*this.radius;
	}

	public  void setRadius(int r)
	{
		this.radius=r;
	}
	public static void main(String[] args)
	{
	Circle c1= new Circle();
	c1.setRadius(2);
	System.out.println("圆的面积"+c1.getArea());
	}
}