package Shape;

public abstract class Shape {

  public abstract void mianji();

  public abstract void zhouchang();

}

package Shape;

import java.util.Scanner;

public class Rectangle extends Shape {

Scanner in=new Scanner(System.in);

    int windth=in.nextInt();

    int length=in.nextInt();

@Override

public void mianji() {

// TODO Auto-generated method stub

    System.out.println("矩形的面积为："+windth*length);

}

@Override

public void zhouchang() {

// TODO Auto-generated method stub

System.out.println("矩形的周长为："+(windth+length)*2);

}

}

package Shape;

import java.util.Scanner;

public class Circle extends Shape {

Scanner in=new Scanner(System.in);

    double Radius=in.nextDouble();

@Override

public void mianji() {

// TODO Auto-generated method stub

System.out.println("圆的面积为："+Math.PI*Radius*Radius);

}

@Override

public void zhouchang() {

// TODO Auto-generated method stub

System.out.println("圆的面积为："+2*Math.PI*Radius);

}

}

package Shape;

public class Test {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

   System.out.println("请输入宽和高：");

   Shape juxing=new Rectangle();

   juxing.mianji();

   juxing.zhouchang();

   System.out.println("请输入半径：");

   Shape yuan=new Circle();

   yuan.mianji();

   yuan.zhouchang();

  }

}