What does it mean if there is a scrollbar on the bottom of a window?
the toolbar has been relocated.
the size of the window’s content has been modified.
there is content above or below what is currently visible.
there is content to the right or left of what is currently visible.

Pp 4.1 design and implement a class called sphere that contains instance data that represents the sphere’s diameter. define the sphere constructor to accept and initialize the diameter and include getter and setter methods for the diameter. include methods that calculate and return the volume and surface area of the sphere (see pp 3.5 for the formulas). include a tostring method that returns a one-line description of the sphere. create a driver class called multisphere, whose main method instantiates and updates several sphere objects.