Data Structures and Algorithms
with Object-Oriented Design Patterns in Java 
Chapter 
introduces the notion of an abstract data type.
All of the data structures discussed in this book
are presented as instances of various abstract data types.
Chapter also introduces the class hierarchy
as well as the various related concepts such as
enumerations and visitors.
Copyright © 1998 by Bruno R. Preiss, P.Eng. All rights reserved.