Q: Some of the cds in the AP book will not compile with Demeter/Java for
   example the Trip example on page page 94.

A: There is a transition document 

http://www.ccs.neu.edu/research/demeter/DemeterJava/forReadersAPBook/APbookWithDemJava.html

  which gives further information.

  The class dictionary notation is almost upward compatible from the
  book to Demeter/Java but the Java
  designers did a trick and introduced classes which matched our
  Demeter classes, except their name. We adapted to the Java names as follows:

======================================
NAME CHANGES

The terminal classes have been renamed as follows:

C++                     Java
---                     ----
DemNumber               Integer
DemString               String
DemIdent                Ident
DemText                 Text
DemReal                 Double

Integer and String and Double are defined in package java.lang.
======================================