Preface

This guide describes how to create modular, extensible, and maintainable J2EE applications. It highlights how to structure your applications so that you get the maximum benefits from the features in Oracle Application Server. You should use this guide along with the Oracle Application Server Containers for J2EE User's Guide.

This preface contains these topics:

• Intended Audience

• Documentation Accessibility

• Related Documentation

• Conventions

Intended Audience

This guide is intended for developers who perform the following tasks:

• Design and create J2EE applications

• Enhance applications to support wireless clients

• Enable applications to run in a portal framework

To use this document, you need to be familiar with Java and have some exposure to J2EE technology.

Documentation Accessibility

Our goal is to make Oracle products, services, and supporting documentation accessible, with good usability, to the disabled community. To that end, our documentation includes features that make information available to users of assistive technology. This documentation is available in HTML format, and contains markup to facilitate access by the disabled community. Standards will continue to evolve over time, and Oracle Corporation is actively engaged with other market-leading technology vendors to address technical obstacles so that our documentation can be accessible to all of our customers. For additional information, visit the Oracle Accessibility Program Web site at

http://www.oracle.com/accessibility/

Accessibility of Code Examples in Documentation

JAWS, a Windows screen reader, may not always correctly read the code examples in this document. The conventions for writing code require that closing braces should appear on an otherwise empty line; however, JAWS may not always read a line of text that consists solely of a bracket or brace.

Accessibility of Links to External Web Sites in Documentation

This documentation may contain links to Web sites of other companies or organizations that Oracle Corporation does not own or control. Oracle Corporation neither evaluates nor makes any representations regarding the accessibility of these Web sites.

Related Documentation

For more information, see these guides:

• Oracle Application Server 10g Concepts

• Oracle Application Server Containers for J2EE User's Guide

• Oracle Application Server Containers for J2EE Support for JavaServer Pages Developer's Guide

• Oracle Application Server Containers for J2EE Servlet Developer's Guide

• Oracle Application Server Containers for J2EE Enterprise JavaBeans Developer's Guide

Conventions

This guide uses the following conventions:

We use various conventions in text to help you more quickly identify special terms. The following table describes those conventions and provides examples of their use.

Convention	Meaning
Bold	Boldface type in text indicates objects (such as buttons and fields) on screens.
Italics	Italic type indicates book titles or emphasis.
Monospace	Monospace type indicates names of files, directories, commands.
Monospaced italics	Monospaced italic type indicates placeholders or variables for which you must supply particular values.
[ ]	Brackets enclose one or more optional items. Do not enter the brackets.
{ }	Braces enclose two or more items, one of which is required. Do not enter the braces.
|	A vertical bar represents a choice of two or more options within brackets or braces. Enter one of the options. Do not enter the vertical bar.
...	Horizontal ellipsis points indicate either: That we have omitted lines of the code that are not related to the example That you can repeat a portion of the code