Exercise 8.5

import java.util.Scanner;
public class Exercises
{
        public static void main(String[] args)
        {
                Scanner scan = new Scanner(System.in);

                System.out.println("input object's radius:");
                double ra = scan.nextDouble();

                System.out.println("input object's height:");
                double he = scan.nextDouble();

                Geometry geometry = new Geometry();

                System.out.println("volume of cube:");

                System.out.println(geometry.cubeVolume());

                System.out.println("surface area of cube:");

                System.out.println(geometry.cubeSurface());

                System.out.println("volume of sphere:");

                System.out.println(geometry.sphereVolume());

                System.out.println("surface area of sphere:");

                System.out.println(geometry.sphereSurface());

                System.out.println("volume of cone:");

                System.out.println(geometry.coneVolume());

                System.out.println("surface area of cone:");

                System.out.println(geometry.coneSurface());

                System.out.println("volume of cylinder:");

                System.out.println(geometry.cylinderVolume());

                System.out.println("surface area of cylinder:");

                System.out.println(geometry.cylinderSurface());




        }
}

package chapter8;

public class Geometry
{
        private double height;
        private double radius;

        public Geometry(double h, double r)
        {
                height = h;
                radius = r;
        }
        public static double cubeVolume(double h)
        {
                return h * h * h;
        }
        public static double cubeSurface(double h)
        {
                return (h * h) * 6;
        }
        public static double sphereVolume(double r)
        {
                return ((r * r * r) * 3.14)/3;
        }
        public static double sphereSurface(double r)
        {
                return 4 * ((r * r) * 3.14);
        }
        public static double coneVolume(double h, double r)
        {
                return 3.14 * (r * r) * (h / 3);
        }
        public static double coneSurface(double h, double r)
        {
                return 3.14 * r * (r + r + h);
        }
        public static double cylinderVolume(double h, double r)
        {
                return 3.14 * (r * r) * h;
        }
        public static double cylinderSurface(double h, double r)
        {
                return 2 * (3.14 * (r * h)) + 2 * ((r * r)* 3.14);
        }

}