Enterprise Java
The J2EE specification defines a framework for building and deploying distributed applications using Java. Many vendors implement J2EE in their server products—BEA WebLogic Server, IBM WebSphere, Sun Microsystems iPlanet Application Server, and Oracle Application Server are four popular examples. Java components that execute in a J2EE environment communicate using Java’s own RMI protocol. J2EE specifies a core set of services, and it should be possible to build applications that are independent of any particular vendor’s implementation. Many vendors have adopted the tried and true strategy of "adding value" to the J2EE specification by implementing proprietary extensions with their products, leading to inconsistencies between implementations. ...
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