package en.edu.shengda;
interface ShapeArea{
 	    double getArea();
 	    double getPerimeter();
 	}
 	
 	class Rectangle implements ShapeArea{
 	    double width;
 	    double height;
 	    double area;
 	    double permeter;
 	    Rectangle(double w,double h){
 	        width=w;
 	        height=h;
 	    }
             @Override
 	    public double getArea(){
 	    area=width*height;
 	    return area;
 	    }   
             @Override
 	    public double getPerimeter(){
 	    permeter=2*(width+height);
 	    return permeter;
 	    }
 	    @Override
 	    public String toString(){
 	        return "长方形的高为"+height+"长方形的宽为"+width+"长方形的周长为"+permeter+"长方形的面积为"+area;
 	    }
 	}
 	    
 	class Circle implements ShapeArea{
 	    double radius;
 	    double π=3.14;
 	    double area;
 	    double permeter;
 	    public Circle(double r){
 	        radius=r;
 	    }
             @Override
 	    public double getArea(){
 	    area=π*radius*radius;
 	    return area;
 	    }   
             @Override
 	    public double getPerimeter(){
 	    permeter=2*radius*π;
 	    return permeter;
 	    }
 	    @Override
 	    public String toString(){
 	        return "圆形的半径为"+radius+"圆形的周长为"+permeter+"圆的面积为"+area;
 	    }
 	}
 	    

public class Test {
    public static void main(String[] args){
 	        ShapeArea rectangle=new Rectangle(10,8);
 	        rectangle.getArea();
 	        rectangle.getPerimeter();
 	        System.out.println(rectangle.toString());
 	        
 	        ShapeArea circle=new Circle(5);
 	        circle.getArea();
 	        circle.getPerimeter();
 	        System.out.println(circle.toString());
 	        
 	    }
}