Here is what my compiler is telling me: GeometryCalculator.java:20: error: constructor Sphere in class Sphere cannot be applied to given types;

Sphere sp = new Sphere(r);

^

required: no arguments

found: double

reason: actual and formal argument lists differ in length

import java.util.Scanner; /** This is a test driver for the Sphere, Cylinder, and Cone class This approach is more object-oriented than the previous one because it clearly separates the duties of each class. */ public class GeometryCalculator { 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(); Sphere sp = new Sphere(r); double v = sp.getVolume(); double s = sp.getSurfaceArea(); System.out.println("The volume of the sphere is: " + v); System.out.println("The surface area of the sphere is: " + s); Cylinder cy = new Cylinder(r, h); v = cy.getVolume(); s = cy.getSurfaceArea(); System.out.println("The volume of the cylinder is: " + v); System.out.println("The surface area of the cylinder is: " + s); Cone co = new Cone(r, h); v = co.getVolume(); s = co.getSurfaceArea(); System.out.println("The volume of the cone is: " + v); System.out.println("The surface area of the cone is: " + s); } }

/** This class provides methods to compute the volume and surface area of a sphere. @author: @version: */ public class Sphere { /** Constructs a Sphere object with input: radius. @param aRadius the radius */ Sphereobject sphere = new Sphereobject(); /** Computes the volume of a sphere. @return volume of sphere */ public static double Computevolume(double r){ double Volume = 4/3*Math.PI*r * Math.pow(r,2); return Volume; } /** Computes the surface area of a sphere. @return surface area of a sphere */ public static double computeSurfaceArea(double r){ double SurfaceArea = 4*Math.PI* Math.pow(r,2); return SurfaceArea; } private double r; }

public class Sphereobject { public static void main(String[] args) { Sphere Sphere1 = new Sphere (); } }

--- Update ---

I left some comments so it would be easier to understand what I had to do but now I am completely confused as to what I have to do to fix this.