Ex. 8.5

package chapter8;
import java.util.Scanner;
public class E85
{
    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);
    }

}