Big Java & Java Concepts example project "measure1"

You can use this project as follows:

 - invoke the main method of the driver class DataSetTester by 
 right-clicking on the class representation and selecting the main method.
 - create a few BankAccount objects
 - create a DataSet object
 - use "add" in DataSet to add the BankAccount objects you have created previously
   from the object bench to the DataSet
 - use the "getAverage" and "getMaximum" methods from the DataSet object to test
   the functionality of the DataSet class.
 - the same can be done with a DataSet and a collection of different coins
 - this is similar to what the DataSetTest class does.
 
This project illustrates concepts covered in Big Java & Java Concepts, Chapter11 
"Interfaces and Polymorphism".

 - developing reusable solutions
 - defining & implementing interfaces
 - converting between types
 - polymorphism