Overview

The J2EE^TM Tutorial

Overview

by Monica Pawlan

Today, more and more developers want to write distributed transactional applications for the enterprise and leverage the speed, security, and reliability of server-side technology. If you are already working in this area, you know that in today's fast-moving and demanding world of e-commerce and information technology, enterprise applications have to be designed, built, and produced for less money, faster, and with fewer resources than ever before.

To reduce costs and fast-track enterprise application design and development, the Java^TM2 Platform, Enterprise Edition (J2EE^TM) platform provides a component-based approach to the design, development, assembly, and deployment of enterprise applications. The J2EE platform gives you a multitiered distributed application model, the ability to reuse components, a unified security model, and flexible transaction control. Not only can you deliver innovative customer solutions to market faster than ever, but your platform-independent J2EE component-based solutions are not tied to the products and APIs of any one vendor.

This tutorial takes an examples-based approach to describing the features and functionalities available in J2EE SDK version 1.3. Whether you are a new or an experienced enterprise developer, you should find the examples and accompanying text a valuable and accessible knowledge base for creating your own enterprise solutions.

If you are new to J2EE applications development, this chapter is a good place to start. Here you will learn the J2EE architecture, become acquainted with important terms and concepts, and find out how to approach J2EE applications programming, assembly, and deployment.

Distributed Multitiered Applications

J2EE Application Components
Client Components
Thin Clients
Web Components
Business Components
Enterprise Information System Tier

J2EE Architecture

Containers and Services
Container Types

Packaging
Development Roles

J2EE Product Provider
Tool Provider
Application Component Provider
Application Assembler
Application Deployer and Administrator

Reference Implementation Software

Web Server
Database Access
J2EE APIs
Tools

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