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Zoo Tutorial

Creating the super beans | Inheritance | Finder methods

This tutorial shows how to exploit inheritance in EJB. This is one of key advantages EJB has over Microsoft's COM technology. Beans can be extended to provide specific data and functionality extensions. This abstract example takes the inheritance relationships in a zoo to illustrate how inheritance can be used. Until all vendors agree on an inheritance model, we don't know which other EJB products it will work with. We gratefully acknowledge the work of Carl Jones and Ceri Hughes from British Telecom plc in contributing the code for this tutorial.

We will endeavour to finish off this tutorial as quickly as possible but we thought it was important to let people have a sneak preview.

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The first week this tutorial was available we distributed the code as a jar file. Many browsers have trouble downloading this, so we also offer it as a zip file.

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