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You can find web applications everywhere on the Internet. Many of these web applications are used to process online forms, tally voting polls, take orders within online stores, allow users to book a flight for their next business trip, or simply to display the user's login name. Which Java technologies do you need to create a web application and which packages do you need to import? The answer depends on what kind of application you're building and what it does.

This article provides an overview of the Java technologies involved in creating various types of web applications, tells you when you might decide to use them, and provides links to get you started. Future articles will cover how to use these technologies in building web applications. To use the technologies described in this article, download Java Development Kit (JDK) 5.0 Update 9 with Java Platform, Enterprise Edition (Java EE) or later and install it on your computer.