The JAVA/J2EE is a platform-independent, Java-centric environment from Sun for developing, building and deploying Web-based enterprise applications online. The J2EE platform consists of a set of services, APIs, and protocols that give the functionality for developing multitiered, Web-based applications, JSP.
Some of the key features and services of JAVA/J2EE:
- At the client tier, J2EE supports pure HTML, as well as Java applets or applications. It relies on JSP and servlet code to create HTML or other formatted data for the client.
- Enterprise JavaBeans (EJB's) provide another layer where the platform's logic is stored. An EJB server provides functions such as threading, concurrency, security and memory management. These services are transparent to the author.
- Java Database Connectivity (JDBC), which is the Java equivalent to ODBC, is the standard interface for Java databases.
- The Java servlets API enhances consistency for developers without requiring a graphical user interface.
- The J2EE Application Programming Model is the standard programming model used to facilitate the development of multi-tier, thin client applications.
- The J2EE Platform includes necessary policies and APIs such as the Java servlets and Java Message Service (JMS).
- The J2EE Compatibility Test Suite ensures that J2EE products are compatible with the platform standards.
- The J2EE Reference Implementation explains J2EE capabilities and provides its operational definition.