What This Book Is Not

While this book is heavily based on Java technologies, we do not describe the specific Java APIs intended for basic J2EE application development (e.g., JSPs, Servlets, and EJB). If you wish to learn the individual API technologies, we highly recommend the J2EE blueprints, tutorials, and recommended books on the official Java home page at http://java.sun.com.

We use UML diagrams to document the patterns and implementation strategies. If you wish to learn the UML basics, please refer to The Unified Modeling Language User Guide by Grady Booch, James Rumbaugh, and Ivar Jacobson (Addison-Wesley, 1999).