create an abstract class Shape with methods calc_area and calc_volume.Derive two classes Sphere(radius),Box(length,breadth,height)from it.Calculate area and volume of both (use method overriding)|EasyCoding45

 In This tutorial, we are going to learn how we can Write a java program to create an abstract class Shape with methods calc_area and calc_volume. Derive two classes Sphere(radius),Box(length, breadth, height)from it. Calculate area and volume of both (use method overriding).

Program :-

abstract class shape

{

abstract void area();

abstract void volume();

}

class sphere extends shape

{

double pi=3.14;

double radius=4.35;

void area()

{

double ar=4*pi*radius*radius;

System.out.println("Area of Sphere is :"+ar);

}

void volume()

{

double vol=(4/3)*(pi*radius*radius*radius);

System.out.println("Volume of Sphere is :"+vol);

}

}

class cone extends shape

{

double pi=3.14;

double radius=4.35;

double height=6.45;

void area()

{

double tot=pi*radius*height;

System.out.println("Area of cone is :"+tot);

}

void volume()

{

double vol=(pi*radius*radius)*(height/3);

System.out.println("Volume of Cone is :"+vol);

}

}

class cylinder extends shape

{

double pi=3.14;

double radius=4.35;

double height=6.45;

void area()

{

double A=(2*pi*radius*height)+(2*pi*radius*radius);

System.out.println("Area of Cylinder is :"+A);

}

void volume()

{

double V=pi*radius*radius*height;

System.out.println("Volume of Cylinder is :"+V);

}

}

class box extends shape

{

int length=5;

int breadth=7;

double height=4.35;

void area()

{

double a=(2*height*breadth)+(2*height*length)+(2*breadth*length);

System.out.println("Area of Box is :"+a);

}

void volume()

{

double v=length*breadth*height;

System.out.println("Volume of Box is :"+v);

}

public static void main(String a[])

{

sphere s=new sphere();

s.area();

s.volume();

cone c=new cone();

c.area();

c.volume();

cylinder cy=new cylinder();

cy.area();

cy.volume();

box b=new box();

b.area();

b.volume();

}

}

Output :-

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