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<h1>Understanding EJB 3.0 Java Persistence API</h1>
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<p>The Java 2 Enterprise Edition(J2EE) Enterprise JavaBeans (EJB) are a component architecture that you use to develop and deploy object-oriented, distributed, enterprise-scale applications. An application written according to the Enterprise JavaBeans architecture is scalable, transactional, and secure.</p>
<p>The EJB 3.0 Java Persistence API (JPA) improves the EJB architecture by reducing its complexity through the use of metadata (annotations) and specifying programmatic defaults of that metadata.</p>
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