Java EE Architecture

Java Platform, Enterprise Edition (in short Java EE) is a widely used platform for server programming in the Java programming language. It contains some libraries which provide functionality to deploy fault-tolerant, multi-tier Java software that run on an application server.

Java EE includes several API specifications, such as JDBC, RMI, e-mail, JMS, web services, XML, etc, and defines how to coordinate them. Java EE also features some specifications unique to Java EE for components. These include Enterprise JavaBeans, servlets, portlets (following the Java Portlet specification), JavaServer Pages and several web service technologies. This allows developers to create enterprise applications that are portable and scalable, and that integrate with legacy technologies. A Java EE "application server" can handle the transactions, security, arity, scalability, concurrency and management of the components that are deployed to it, meaning that the developers can concentrate more on the business logic of the components rather than on infrastructure and integration tasks.