Aimed at the intermediate to advanced java developer or architect j2ee design patterns applied offers a compendium of the latest thinking on using java effectively to build scalable enterprise systems filled with hints and excellent best practices on software patterns this book will be nearly indispensable for anyone who wants to become an expert at java design while there are a good many available books on software patterns this is one of the few that concentrate on reusable software . This is the fourth and final article in a short series dedicated to design patterns in java and a direct continuation from the previous article behavioral design patterns in java j2ee patterns j2ee patterns are concerned about providing solutions regarding java ee these patterns are widely accepted by other frameworks and projects. J2ee design patterns are built for the developing the enterprise web based applications in j2ee there are mainly three types of design patterns which are further divided into their sub parts 1 presentation layer design pattern. Java ee 5 killed the majority of the j2ee patterns their problem and forces descriptions do not apply any more java ee 6 and 7 killed the remaining patterns only the application service is still useful if you take the pattern definitions seriously and look at some enterprise projects you are not going to understand the design patterns are going to be applied without having a problem . Application design elaborated by applying the j2ee patterns at a high level as a result the architectural and application design satisfied the project needs and requirements and the huva software has been implemented in practice according to the design keywords j2ee architecture pattern enterprise system