Java 2 Platform, Enterprise Edition (J2EE) Overview

 
Contents
 
The Platform for Enterprise Solutions
Making Middleware Easier
The Standard with Industry Momentum
 
The Platform for Enterprise Solutions
The Java 2 Platform, Enterprise Edition (J2EE) defines the standard for developing multitier enterprise applications. The J2EE platform simplifies enterprise applications by basing them on standardized, modular components, by providing a complete set of services to those components, and by handling many details of application behavior automatically, without complex programming.

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.
 
Making Middleware Easier
Today's enterprises gain competitive advantage by quickly developing and deploying custom applications that provide unique business services. Whether they're internal applications for employee productivity, or Internet applications for specialized customer or vendor services, quick development and deployment are key to success.

Portability and scalability are also important for long term viability. Enterprise applications must scale from small working prototypes and test cases to complete 24 x 7, enterprise-wide services, accessible by tens, hundreds, or even thousands of clients simultaneously.

However, multitier applications are hard to architect. They require bringing together a variety of skill sets and resources, legacy data and legacy code. In today's heterogeneous environment, enterprise applications have to integrate services from a variety of vendors with a diverse set of application models and other standards. Industry experience shows that integrating these resources can take up to 50% of application development time.

As a single standard that can sit on top of a wide range of existing enterprise systems -- database management systems, transaction monitors, naming and directory services, and more -- the J2EE platform breaks the barriers inherent between current enterprise systems. The unified J2EE standard wraps and embraces existing resources required by multitier applications with a unified, component-based application model. This enables the next generation of components, tools, systems, and applications for solving the strategic requirements of the enterprise.

The J2EE specification also supports emerging Web Services technologies through inclusion of the WS-I Basic Profile. WS-I Basic Profile compliance means that the developers can build applications on the J2EE platform as Web services that interoperate with Web services from non-J2EE compliant environments.

With simplicity, portability, scalability, and legacy integration, the J2EE platform is the platform for enterprise solutions.
 
The Standard with Industry Momentum
While Sun Microsystems invented the Java programming language and pioneered its use for enterprise services, the J2EE standard represents a collaboration between leaders from throughout the enterprise software arena. Our partners include OS and database management system providers, middleware and tool vendors, and vertical market applications and component developers. Working with these partners, Sun has defined a robust, flexible platform that can be implemented on the wide variety of existing enterprise systems currently available, and that supports the range of applications IT organizations need to keep their enterprises competitive.

The success of the J2EE platform in the enterprise continues to rise as more than two-thirds of enterprise software development managers use the J2EE platform to develop and deploy their applications. With addition of interoperable Web services and other new features in version 1.4, the J2EE platform will continue to be the industry standard for enterprise solutions for many years to come.
 


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