实验八：接口与实现接口的类

一、源代码

package baijh;

public class ba {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        
        
        yuanzhui a=new yuanzhui(1,2,3);
        yuanzhui b=new yuanzhui(4,5,6);
        System.out.println(a.Area());
        System.out.println(b.Area());
        System.out.println(a.volume());
        System.out.println(b.volume());
        System.out.println("体积较大的是："+Math.max(a.volume(), b.volume()));
        }
        }
        class yuanzhui implements Volume,Area{
        protected double r;
        protected double l;
        protected double h;
        public yuanzhui(double r,double l,double h){
        this.r=r;
        this.l=l;
        this.h=h;
        }
        public double volume(){
        return Math.PI*Math.pow(r,2)*h/3;
        }
        public double Area(){
        return Math.PI*this.r*this.r+this.r*this.l;

        }
        }
        interface Volume{
        public double volume();
        }
        interface Area{
        public double Area();
    }

二、心得体会

接口的虚函数只有在类里面实现了才不会出错，不然会一直提醒你有错误