Suggested Projects

Skill-Building Exercises

1. Research:   Procure a copy of Bertrand Meyer’s excellent book Object-Oriented Software Construction, Second Edition, and read it from front to back.

2. Research:   Procure a copy of Robert C. Martin’s book Designing Object-Oriented C++ Applications Using The Booch Method. (Although the Booch diagramming notation has been superseded by the Unified Modeling Language, and the code examples are given in C++, the Java student will still gain much from reading this excellent work.)

3. Research:   Conduct a web search for the keywords Liskov substitution principle, open-closed principle, dependency inversion principle, and Meyer design by contract programming.

4. Design Modification:   Create a new checked exception named InvalidPreconditionException and utilize it instead of the Java assertion mechanism to signal invalid preconditions. (Hint: The Incrementer.incrementer() method, and any methods that override it, should throw this exception if the precondition is invalid.)