The J2EE platform takes advantage of many features of the Java 2 Platform, Standard Edition (J2SE), such as
"Write Once, Run Anywhere" portability,
JDBC API for database access,
CORBA technology for interaction with existing enterprise resources, and
A security model that protects data, even in Internet applications.

Building on this base, the Java 2 Platform, Enterprise Edition adds full support for Enterprise JavaBeans components, Java Servlets API, JavaServer Pages and XML technology. The J2EE standard includes complete specifications and compliance tests to ensure portability of applications across the wide range of existing enterprise systems capable of supporting the J2EE platform. In addition, the J2EE specification now ensures Web services interoperability through support for the WS-I Basic Profile.