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Java is a high level object oriented programming language (similar to C++) developed by Sun Microsystems. The programming language was originally called OAK before Sun Microsystems changed it to Java in 1995. There are three types of Java platforms: Java Standard Edition (Java SE), Java Enterprise Edition (Java EE), and Java Micro Edition (Java ME). Each of the platforms has their own language version, a set of standard libraries, and a virtual machine to execute the code.

Java 2 Platform, Enterprise Edition, or j2ee is a popular server programming platform in java programming language. The name of this platform changed to Java EE in version 5, and the newest version is Java EE 6. The difference between Java EE and Java Standard Edition (Java SE) is that Java EE has libraries that give the ability to deploy multi-tier Java software mostly based on modular components that are running on an application server. One of the benefits of Java EE is that it is available for free. It can be downloaded from Sun Microsystem’s website.

There are several API specifications in Java EE, such as Java Database Connectivity (JDBC), Java Remote Method Invocation (Java RMI), e-mail, Java Message Service (JMS), web services, XML, etc. Java EE also defines how to coordinate them. There are also some specifications that are unique to Java EE components, such as Enterprise JavaBeans (EJB), Connectors, Servlets, Portlets, JavaServer Pages, and some web service technologies.

Java EE enables developers to create enterprise applications that are portable and scalable, and can also be integrated with legacy technologies. Java EE application server can handle transactions, security, scalability, concurrency, and management of the components assigned. This allows developers to concentrate on the business logic of the components instead of the infrastructure and integration. In order to declare that their products are Java EE compliant, developers must meet some performance requirements.