Big Java example project "caesar"

You can use this project as follows:

 - invoke the main method of the driver class EncryptorTest by right-clicking 
 on the class representation and selecting the main method.
 
Note: Sometimes in BlueJ a dialog (such as input dialog or file chooser)
 appears right at the back of any open windows.  If you cannot see
 a dialog after calling the Driver class main method, minimize any 
 other windows to find the dialog.
 
This project illustrates concepts covered in Big Java, Chapter 15 
"Streams".
  
 - to be able to read and write files
 - to become familiar with the concepts of text and binary files
 - to be able to read and write objects using serialization
 - to be able to process the command line
 - to learn about encryption
 - to understand when to use sequential and random access files
