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<h1>Understanding Java persistence</h1>
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<p><a id="sthref42" name="sthref42"></a><span class="italic">Persistence</span> refers to the ability to store objects in a database and use those objects with transactional integrity. In a J2EE application, data is typically stored and persisted in the data tier, in a relational database.</p>
<p><a id="sthref43" name="sthref43"></a><span class="italic">Entity beans</span> are enterprise beans that contain persistent data and that can be saved in various persistent data stores. The entity beans represent data from a database; each entity bean carries its own identity. Entity beans can be deployed using <span class="italic">application-managed persistence</span> or <span class="italic">container-managed persistence</span>.</p>
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