The Java 2 Enterprise Edition Model

At the JavaOne conference in San Francisco in June 1999, Sun Microsystems announced a new architecture for Java, with separate editions for different types of applications: the Java 2 Standard Edition (J2SE) for desktop and workstation devices; the Java 2 Micro Edition (J2ME) for small devices such as cell phones, pagers, and PDAs; and the Java 2 Enterprise Edition (J2EE) for server-based applications.

J2EE is a compilation of various Java APIs that have previously been offered as separate packages; an Application Programming Model (APM) (also known as the J2EE Blueprints) that describes how they can all be combined; and a test suite J2EE vendors can use to test their products for compatibility. J2EE has gone through a number of revisions since 1999, and the latest version (J2EE 1.4) includes the following enterprise-specific APIs among others:

  • JavaServer Pages (JSP)

  • Java Servlet

  • Enterprise JavaBeans (EJB)

  • Java Database Connection (JDBC)

  • Java Transaction API (JTA) and Java Transaction Service (JTS)

  • Java Naming and Directory Interface (JNDI)

  • Java Message Service (JMS)

  • Java IDL and Remote Method Invocation (RMI)

  • Java API for XML Parsing (JAXP), Java API for XML-based RPC (JAX-RPC), SOAP with Attachments API for Java (SAAJ), and Java API for XML Registries (JAXR)

  • JavaMail and JavaBeans Activation Framework (JAF)

  • J2EE Connector Architecture (JCX)

  • Java Authentication and Authorization Service (JAAS)

  • Java Management Extensions (JMX)

In addition, all the J2SE APIs ...

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