Program to calculate volume of sphere using multilevel inheritance demonstrating method overriding

import   java.util.Scanner;

import  java.util.*;

interface supz

{final double pi=3.14; public void display();}

class Data

{

 double r;

 public void gdata()

 {

  System.out.println("Enter Radius");

  Scanner s = new Scanner(System.in);

  r=s.nextFloat();

 }

}

class Area extends Data

{

 double area;

 public void aclc()

 {area = r*r*3.14;}

 public void display()

 {System.out.println("Area of Circle= "+area);}

}

class  Volume extends Area implements supz

{

 double v;

 public void vclc()

 {v=(4*r*r*r*pi)/3;}

 public void display()

 {super.display(); System.out.println("Volume of Sphere= "+v);}

}

class E7B

{

 public static void main(String args[])

 {

  Volume v = new Volume();

  v.gdata(); v.aclc(); v.vclc();

  v.display();

 }

}

OUTPUT

F:\java program\OOPM>javac E7B.java

F:\java program\OOPM>java E7B

Enter Radius

5

Area of Circle= 78.5

Volume of Sphere= 523.3333333333334