Implement your Sphere class so that it has a second constructor, this one taking a parameter representing the diameter. Create a Cube class similar to the Sphere class but instead of setting the diameter it sets the length of the sides of the cube. Include the this reference on the parameters for each class.

Sphere Class:

public class Sphere { private int diameter; public Sphere() { diameter = 1; } public void setDiameter(int d) { diameter = d; } public int getDiameter() { return diameter; } public double getVolume() { double radius = diameter / 2; double pi = (double) 22 / 7; double volume = (4 * pi * radius * radius * radius)/3; return volume; } public double getSurfaceArea() { double radius = diameter / 2; double pi = (double) 22 / 7; double area = 4 * pi * radius * radius; return area; } public String toString() { return "A sphere with a diameter of " + getDiameter() + " has a volume of " + String.format("%.2f", getVolume()) + " and a surface area of " + String.format("%.2f", getSurfaceArea()); } }