Big Java & Java Concepts example project "cashregister"

You can use this project as follows:

 - invoke the main method of the compiled CashRegisterTester class by right-clicking on the class
 representation and selecting the main method.
 - create a CashRegister object
 - make purchases, enter payments and give change using CashRegister objects   
 
 
This project illustrates concepts covered in "Big Java" and "Java Concepts", Chapter 3 
"Implementing Classes".

 - to become familiar with the process of implementing classes
 - to understand the purpose and use of constructors 
 - to understand how to access instance fields and local variables 
 - to appreciate the importance of documentation comments