Project: number-display
Authors: Michael Kölling and David J. Barnes

This project is part of the material for the book

   Objects First with Java - A Practical Introduction using BlueJ
   Sixth edition
   David J. Barnes and Michael Kölling
   Pearson Education, 2016

It is discussed in chapter 3.

To use this project, create an instance of class NumberDisplay. Then inspect this 
instance and leave the inspector window open. With the inspector window open, 
call the object's methods, such as increment and setValue.
