15)Define an abstract class Shape with abstract methods area() and volume(). Write a java program to calculate area and volume of Cone and Cylinder.
import java.util.*;
abstract class Shape
{
final float PI=3.14f;
Scanner s=new Scanner(System.in);
abstract void area();
abstract void volume();
}
class Cylinder extends Shape
{
float a,r,h,v;
void accept()
{
System.out.println("Enter the radius and Height ");
r=s.nextFloat();
h=s.nextFloat();
}
void area()
{
a = (2*PI*r*h)+(2*PI*r*r);
System.out.println("Area of Cylinder is :"+a);
}
void volume()
{
v=PI*r*r*h;
System.out.println("Volume of Cylinder is :"+v);
}
}
class Cone extends Shape
{
float a,r,h,v;
void accept()
{
System.out.println("Enter the radius and Height ");
r=s.nextFloat();
h=s.nextFloat();
}
void area()
{
a=PI*r*(r+(float)Math.sqrt(h*h+r*r));
System.out.println("Area of Cone is :"+a);
}
void volume()
{
v=PI*r*r*(h/3);
System.out.println("Volume of Cone is :"+v);
}
}
class Slip15
{
public static void main(String args[])
{
Cylinder s1=new Cylinder();
Cone s2=new Cone();
s1.accept();
s2.accept();
s1.area();
s1.volume();
s2.area();
s2.volume();
}
}
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