Enterprise JavaBeans: Helper Classes DC

Baldwin presents a sample enterprise bean program that you can use to hone your skills in the deployment of EJBs into the J2EE server. This bean makes use of helper classes, requiring you to take that into account in the deployment process.

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Java Programming, Lecture Notes #1322 * Preface * Preview * Sample Program * Interesting Code Fragments * Summary * Where To From Here? * Complete Program Listings -----------------------------------

Preface

This is one in a series of lessons designed to teach you about Sun's Enterprise JavaBeans (EJB).

A cookbook approach

Previous lessons in this series provided accelerated instructions to help you get your first enterprise bean up and running as quickly as possible.

In working through the accelerated lessons, I provided the information more or less in a cookbook fashion.

A change of pace

Now that you have your first enterprise bean running successfully in your J2EE server, it is time to slow down the pace, and embark on the task of understanding Enterprise JavaBeans (not only what, but also how and why).

The purpose of the remaining lesson in this series on EJB will be to help you really understand what enterprise beans are, how to write them, and how to use them to advantage.

From this point on, I intend to go much more slowly explaining things more carefully as I proceed. Along the way, I will show you lots of sample bean programs, each of which will be as simple as I can make it while still illustrating the concept that the program is intended to illustrate...

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