What is Java EE? [duplicate]

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What exactly is Java EE? (4 answers)

Closed 4 years ago.

I realize that literally it translates to Java Enterprise Edition. But what I'm asking is what does this really mean? When a company requires Java EE experience, what are they really asking for? Experience with EJBs? Experience with Java web apps?

I suspect that this means something different to different people and the definition is subjective.

Answer 1

There are 2 version of the Java Environments, J2EE and Se. SE is the standard edition, which includes all the basic classes that you would need to write single user applications. While the Enterprise Edition is set up for multi-tiered enterprise applications, or possible distributed applications. If you'd be using app servers, like tomcat or websphere, you'd want to use the J2EE, with the extra classes for n-tier support.

Answer 2

J(2)EE, strictly speaking, is a set of APIs (as the current top answer has it) which enable a programmer to build distributed, transactional systems. The idea was to abstract away the complicated distributed, transactional bits (which would be implemented by a Container such as WebSphere or Weblogic), leaving the programmer to develop business logic free from worries about storage mechanisms and synchronization.

In reality, it was a cobbled-together, design-by-committee mish-mash, which was pushed pretty much for the benefit of vendors like IBM, Oracle and BEA so they could sell ridicously over-complicated, over-engineered, over-useless products. Which didn't have the most basic features (such as scheduling)!

J2EE was a marketing construct.

Answer 3

Seems like Oracle is now trying to do away with JSPs (replace with Faces) and emulate Spring's REST (JAX-RS) and DI.

ref: https://docs.oracle.com/javaee/7/firstcup/java-ee001.htm

Table 2-1 Web-Tier Java EE Technologies

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JavaServer Faces technology

A user-interface component framework for web applications that allows you to include UI components (such as fields and buttons) on a XHTML page, called a Facelets page; convert and validate UI component data; save UI component data to server-side data stores; and maintain component state

Expression Language

A set of standard tags used in Facelets pages to refer to Java EE components

Servlets

Java programming language classes that dynamically process requests and construct responses, usually for HTML pages

Contexts and Dependency Injection for Java EE

A set of contextual services that make it easy for developers to use enterprise beans along with JavaServer Faces technology in web applications