What are the Java EE restrictions

Software development with Java EE


The acronym Java EE (J2EE) stands for Java 2 Platform, Enterprise Edition. The software platform supports large enterprise computing at the mainframe level and software development. Companies like IBM have developed Java EE for simpler methods of application development in a tiered environment. With J2EE, companies can adopt simple processes for developing software applications and reduce programming and training costs, as the software platform helps developers create standardized, reusable modules. In addition, the software enables a multi-layer architecture to handle various programming aspects automatically.

General APIs (Applications)

EE APIs encompass several software development technologies:

  • javax.servlet: This servlet defines a number of APIs for addressing HTTP requests. The specifications contained in this servlet are JavaServer Pages.
  • javax.faces: This is the root directory of the JavaServer Faces (JSF) API. This technology is used to develop user interfaces using multiple components.
  • javax.websocket: The WebSocket specification defines APIs associated with WebSocket connections.
  • javax.faces.component: This part of the JavaServer Faces API is component-oriented and one of the core packages. This software tool contains a UML diagram of the component hierarchy.
  • javax.enterprise.inject: Contains injection notes that define beans, stereotypes, built-in qualifiers, classes, and interfaces that are associated with the Contexts and Dependency Injection (CDI) APIs.
  • javax.el: The package defines classes and user interfaces for Expression Language from Java EE. Expression Language was specifically designed to meet the needs of web application development.
  • javax.enterprise.context: This package defines context annotations and interfaces that exist under the CDI API (Contexts and Dependency Injection).
  • javax.ejb: The Enterprise JavaBean is a framework that contains lightweight APIs, i. H. a set of reusable code for communicating with other software applications. Key features supported by this framework include serving transactions using JTA, concurrency control, remote procedure calls (RMI / RMI-IIOP), access control, and dependency injection for business objects. Enterprise JavaBeans classes and interfaces define contracts between clients and enterprise beans along with the EJB container and enterprise beans.
  • javax.validation: Annotations and interfaces included in this package support the declarative validation functions provided by the Bean Validation API. This API provides a complete solution for setting up bean restrictions that can be enforced across multiple class levels. J2EE takes bean validation restrictions into account in the persistence layer, whereas JavaServer Faces performs the same functions in the view layer.


If the software application requires a large and distributed component system, you should use Java-EE. Java EE includes libraries such as JDBC, JPA for database access, RMI for remote method identification, JMS for messaging, and other libraries for XML processing, and web services. Java-EE defines standard APIs for Enterprise JavaBeans, portlets, servlets, JS pages, etc.