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：