Java online training – Java J2EE

The Java Platform, Enterprise Edition or Java EE (formerly known as Java 2 Platform, Enterprise Edition or J2EE) has undergone several changes since Java J2EE-1.0 as well as numerous additions of new specifications.

Java J2EE 1.4, the predecessor to the Java EE 5 platform, has many powerful features than older version of Java API. Here are a few of the significant changes of Java J2EE:

In Java EE 5 platform most boilerplate requirements have been eliminated, and Javascript XML descriptors are now optional. For example, the EJB-jar.XML Javascript descriptor is no longer necessary in most cases.

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Java EE 5 platform, more defaults are available, with a special emphasis on making them meaningful. Java Developers now have fewer details to remember.
The EJB software programming model is significantly simpler in Java EE 5 platform.
The new Java Persistence API is available to all Java API platform applications, including those based on Java EJB technology.

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