In this thesis, the essential Java EE technologies and APIs are outlined to create a better understanding of the fundamentals, while providing examples that can be easily understood with some knowledge of Java and mark-up languages such as XML and HTML. The first chapter would provide a clear introduction which is advised for the beginners of Java EE. The later chapters would discuss the crucial elements that are needed for the Java EE applications. These chapters may be read in the desired order. On the last chapter, a summary would be supplied with a conclusion.