Java Slip 1 :- Abstract Class Shape TYBSc Computer Science Pune University

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/* Create an abstract class shape. Derive three classes sphere, cone and cylinder from it. Calculate area

and volume of all (use method overriding)*/

import java.io.*;

abstract class Shape

{

double r,h;

Shape(double r,double h)

{

this.r=r;

T his.h=h;

}

abstract void area();

abstract void volume();

}

class Cyclinder extends Shape

{

Cyclinder(double x,double y)

{

super(x,y);

}

void area()

{

double a;

a=(2*3.14*r*h)+(2*3.14*r*r);

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

}

void volume()

{

double v;

v=3.14*r*r*h;

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

}

}

class Cone extends Shape

{

Cone(double x,double y)

{

super(x,y);

}

void area()

{

double x,a;

x=(h*h)+(r*r);

a=3.14*r*(r+Math.sqrt(x));

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

}

void volume()

{

double v;

v=3.14*r*r*(h/3);

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

}

}

class Box extends Shape

{

double b;

Box(double x,double y,double z)

{

super(x,y);

b=z;

}

void area()

{

double x1,y1,z1,a;

x1=h*b;

y1=h*r;

z1=b*r;

a=(2*x1)+(2*y1)+(2*z1);

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

}

void volume()

{

double v;

v=h*b*r;

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

}

}

class Sphere1 extends Shape

{

Sphere1(double x,double y)

{

super(x,y);

}

void area()

{

double a;

a=4*3.14*r*r;

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

}

void volume()

{

double v;

v=(4/3)*3.14*r*r*r;

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

}

public static void main(String g[])throws Exception

{

BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

System.out.println("Enter radius:");

double p=Double.parseDouble(br.readLine());

System.out.println("Enter height:");

double q=Double.parseDouble(br.readLine());

System.out.println("Enter breadth:");

double r=Double.parseDouble(br.readLine());

System.out.println("Enter length:");

double w=Double.parseDouble(br.readLine());

Cyclinder c1=new Cyclinder(p,q);

c1.area();

c1.volume();

Cone c2=new Cone(p,q);

c2.area();

c2.volume();

Box b1=new Box(w,r,q);

b1.area();

b1.volume();

Sphere1 s1=new Sphere1(p,0);

s1.area();

s1.volume();

}

}

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