I used metrics for getting the metrics of ATMExample, and the number of classes reported in Summary Statistics is 57. However, 65 class files are generated when the project is compiled. Also, the file types.csv reports 67 types.
I found the following duplications in types.csv:
PACKAGE TYPE LINE
banking Receipt$(anonymous) 59
banking Receipt$1 59
simulation SimulatedBank$Failure 236
simulation SimulatedBank.Failure 236
The source code of ATMExample is available here: http://www.cs.gordon.edu/local/courses/cs211/atmexample.tar
the file as it was generated with duplications highlighted