Following are the advantages of the J2EE platform:

• Support for Web Services: J2EE provides a platform to develop and deploy web services. The JAX-RPC (Java API for XML based Remote Procedure Call) HELPS developers develop SOAP-based portable and interoperable web services, clients and endpoints.
• Faster Time to Market: J2EE uses the CONCEPT of containers for simplifying the development. This helps in business logic separation from lifecycle management and resources which aids developers to focus on business logic than on the infrastructure. For instance, the EJB (Enterprise JavaBeans) container takes CARE of threading, distributed communication, transaction management, SCALING etc and provides a necessary abstraction to the developers.
• Compatibility: J2EE platform follows the principle of “Write Once, Run Anywhere”. It provides comprehensive standards and APIs that ensures compatibility among different application vendors resulting in the portability of applications.
• Simplified connectivity: J2EE helps in easier applications connectivity which allows utilizing the capabilities of different devices. It also provides JMS (Java Message Service) to integrate diverse applications in asynchronous and loosely coupled ways. It also provides CORBA (Common Object Request Broker Architecture) support for linking systems tightly via remote calls.

Due to all the above benefits packed in one technology, it helps the developers to reduce the TCO (Total Cost of Ownership) and also focus more on actual business logic IMPLEMENTATION.