Hi rose AS per my knowledge J2EE is a java 2 enterprise editon, this is because of initially java is for simple applications, Later on it was developed to enterprise applications (enterprise applications are the applications to share the information in an organization or in different dept's
via the software applications.)which are developed using java language for this java provided many predefined classes.And finally you may ask why do I implement this language? as we know that java can run in any platform once it is compiled and converted in .class file .