实验八，接口与实现接口的类
实现程序代码如下：
<br>package shiyan8;<br>import java.util.Scanner<br>public class Yuanzhuiti { private double radius;private double length; private double height; public Yuanzhuiti(double radius,double length,double height) { this.radius = radius; this.length = length; this.height = height; } public Yuanzhuiti() { this(0,0,0); } public double area() //计算圆锥的表面积，实现Area接口中的抽象方法{return Math.PI*this.radius*this.length+Math.PI*this.radius* this.radius ; } public double volume() //计算圆锥的体积，实现Volume接口中的抽象方法{return Math.PI * this.radius * this.radius * this.height/3; } public String toString() { return "一个圆锥，半径"+this.radius+",斜边"+this.length+"，高"+this.height+"+表面积为"+this.area()+"，体积为"+this.volume(); } public static void main(String args[]) { @SuppressWarnings("resource") Scanner shuru=new Scanner(System.in); int r,h,l; System.out.println("请输入圆锥体的底面半径r");// r=shuru.nextInt(); System.out.println("请输入圆锥体的斜边长l");// l=shuru.nextInt(); System.out.println("请输入圆锥体的高h");// h=shuru.nextInt(); Yuanzhuiti y=new Yuanzhuiti(r,l,h); System.out.println(y.toString()); System.out.println("请输入圆锥体的底面半径r");// r=shuru.nextInt(); System.out.println("请输入圆锥体的斜边长l");// l=shuru.nextInt(); System.out.println("请输入圆锥体的高h");// h=shuru.nextInt(); Yuanzhuiti m=new Yuanzhuiti(r,l,h); System.out.println(m.toString()); if(y.volume()>m.volume()) { System.out.println("体积为"+y.volume()+"的圆锥体体积大"); }else { System.out.println("体积为"+m.volume()+"的圆锥体体积大"); } } }执行结果如下：
