As a course assignment I took a UML design that was adapted for the purpose of the course by the instructor from one that was created by Doug Rosenberg of Iconixsw.com and implemented the software for it. The origional design can be found at http://www.iconixsw.com/UMLworkbook.html.
or
In either case read UML_Model.pdf included in the zip/tar file for a full discription of the assignment. report.html was my report on the assignemnt. Type 'java Customer' to run it must have the Java Virtual Machine 1.4.1 or later installed to run it.
In case you don't have the JVM it's available here