Object-Oriented Data Structures using Java teaches the classic data structures with an informal, yet rigorous, approach; it includes the appropriate object-oriented concepts and makes use of the appropriate Java constructs. The textbook is designed for students who have already taken one semester of computer science and are able to take a problem of medium complexity, write an algorithm to solve the problem, code the algorithm in a programming language, and demonstrate the correctness of their solution. The focus is on teaching computer science principles with chapter concepts being reinforced by case studies. The object-oriented concepts of encapsulation, inheritance, and polymorphism are covered, while the book remains centered on abstract data types.