A Java program that will compute the volume and surface area of a sphere with radius r, a cylinder with circular base with radius r and height h, and a cone with circular base with radius r and height h.

Geometry.java

//Geometry.java - Jimmy Kurian

public class Geometry
{

   public static double sphereVolume(double r)
   {
      return (4.0 / 3.0) * Math.PI * r * r * r;
   }

   public static double sphereSurface(double r)
   {
      return 4.0 * Math.PI * r * r;
   }

   public static double cylinderVolume(double r, double h)
   {
      return h * Math.PI * r * r;
   }

   public static double cylinderSurface(double r, double h)
   {
      return (2.0 * r * Math.PI * h) + (2.0 * Math.PI * r * r);
   }

   public static double coneVolume(double r, double h)
   {
      return (1.0 / 3.0) * Math.PI * r * r * h;
   }

   public static double coneSurface(double r, double h)
   {
      return Math.PI * r * (h + r);
   }
}

GeometryTester.java

//GeometryTester.java - Jimmy Kurian

import java.util.Scanner;

public class GeometryTester
{
   public static void main(String[] args)
   {
      Scanner in = new Scanner(System.in);

      System.out.println("Please enter the radius: ");
      double r = in.nextDouble();

      System.out.println("Please enter the height: ");
      double h = in.nextDouble();

      System.out.println("The volume of the sphere is: "
            + Geometry.sphereVolume(r));
      System.out.println("The surface area of the sphere is: "
            + Geometry.sphereSurface(r));
      System.out.println("The volume of the cylinder is: "
            + Geometry.cylinderVolume(r, h));
      System.out.println("The surface area of the cylinder is: "
            + Geometry.cylinderSurface(r, h));
      System.out.println("The volume of the cone is: "
            + Geometry.coneVolume(r, h));
      System.out.println("The surface area of the cone is: "
            + Geometry.coneSurface(r, h));
   }
}