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Formerly known as Java 2 Platform Enterprise Edition (J2EE),Java Platform Enterprise Edition (Java EE), is a computing platform for development and deployment of enterprise software (network and web services)

The platform uses the object-oriented Java programming language. It is part of the Java software platform family. Java EE extends the Java Platform, Standard Edition (Java SE), providing an API for object-relational mapping, distributed and multitier architectures, and web services. The platform incorporates a design based largely on modular components running on an application server. The platform emphasizes convention over configuration and annotations for configuration. Optionally XML can be used to override annotations or to deviate from the platform defaults

Java EE is developed using the Java Community Process, with contributions from industry experts, commercial and open source organizations, Java User Groups, and countless individuals


JEE Version History :

The platform was known as Java 2 Platform, Enterprise Edition or J2EE from version 1.2, until the name was changed to Java Platform, Enterprise Edition or Java EE in version 1.5. The current version is called Java EE 8

➯ J2EE 1.2 (December 12, 1999)
➯ J2EE 1.3 (September 24, 2001)
➯ J2EE 1.4 (November 11, 2003)
➯ Java EE 5 (May 11, 2006)
➯ Java EE 6 (December 10, 2009)
➯ Java EE 7 (May 28, 2013,( April 5, 2013 according to spec document)
➯ Java EE 8 (Expected by the end of 2017)
JEE General APIs :

Java EE is defined by its specification. As with other Java Community Process specifications, providers must meet certain conformance requirements in order to declare their products as Java EE compliant.
The Java EE APIs includes several technologies that extend the functionality of the base Java SE APIs.

➯ javax/servlet
➯ javax/faces
➯ javax/faces/component
➯ javax/el
➯ javax/enterprise/inject
➯ javax/enterprise/context
➯ javax/ejb
➯ javax/validation
➯ javax/persistence
➯ javax/transaction
➯ javax/security/auth/message
➯ javax/enterprise/concurrent
➯ javax/jms
➯ javax/batch/api
➯ javax/resource

JEE Code sample :

The code sample shown below demonstrates how various technologies in Java EE 7 are used together to build a web form for editing a user.

In Java EE a (web) UI can be built using Servlet, JavaServer Pages (JSP), or JavaServer Faces (JSF) with Facelets. The example below uses JSF and Facelets. Not explicitly shown is that the input components use the Java EE Bean Validation API under the covers to validate constraints.


In Java EE a (web) UI can be built using Servlet, JavaServer Pages (JSP), or JavaServer Faces (JSF) with Facelets. The example below uses JSF and Facelets.




Example Bean class :

The example below uses Contexts and Dependency Injection (CDI) and Enterprise JavaBean (EJB).

									public class UserEdit {
										private User user;

										private UserDAO userDAO;
										public String saveUser() {
											addFlashMessage("User " + this.user.getId() + " saved");
											return "users.xhtml?faces-redirect=true";

										public void setUser(User user) {
											this.user = user;

										public User getUser() {
											return user;


Example DAO class:

To implement business logic, Enterprise JavaBean (EJB) is the dedicated technology in Java EE.

						public class UserDAO {
							private EntityManager entityManager;
							public void save(User user) {
							public void update(User user) {

							public List getAll() {
								return entityManager.createNamedQuery("User.getAll", User.class)

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