Test-driven development was first introduced as part of the extreme programming (XP) paradigm. While not everyone agrees with all aspects of XP, most developers believe in the benefits of test-driven development. Although the basic techniques of test-driven development are simple to understand, its application in the real world requires knowledge of certain tools and techniques needed to effectively create, run and organize tests. This book is targeted at Java developers who want to learn how to use test-driven development to improve the development process for constructing J2EE applications.