1. (In Java) Write static methods for the following • public­static­double­spher

Question

1. (In Java) Write static methods for the following • public­static­double­sphereVolume(double­r) • public­static­double­sphereSurface(double­r) • public­static­double­cylinderVolume(double­r,­double­h) • public­static­double­cylinderSurface(double­r,­double­h) • public­static­double­coneVolume(double­r,­double­h) • public­static­double­coneSurface(double­r,­double­h) that compute the volume and surface area of a sphere with a radius r, a cylinder with a circular base with radius r and height h, and a cone with a circular base with radius r and height h. Place them into a class Geom­etry. Then write a program that prompts the user for the values of r and h, calls the six methods, and prints the results. Incorporate proper exception handling for all methods as well as the program.

Explanation / Answer

Hello there ,

Kindly find below code and its output.

/**
* This class provides various static methods to calculate surface and volume.
* @author dipal.prajapati
*
*/
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);
}
}

import java.text.DecimalFormat;
import java.util.Scanner;

/**
* It calculate various geometry's surface and volume.
* @author dipal.prajapati
*
*/
public class SurfaceVolumeCalculation {
   static DecimalFormat df = new DecimalFormat("####0.00");

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

}

===O/P===

Please enter the radius:
23.57
Please enter the height:
34.9
The volume of the sphere is: 54848.83
The surface area of the sphere is: 6981.18
The volume of the cylinder is: 60910.82
The surface area of the cylinder is: 8659.10
The volume of the cone is: 20303.61
The surface area of the cone is: 4329.55

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