Introduction to JEE,Various types of APIs in JEE

Java Platform Enterprise Edition or Java EE is a widely used platform for server programming in the Java programming language. The Java Platform (Enterprise Edition) differs from the Java Standard Edition Platform (Java SE) in that it adds libraries which provide functionality to deploy fault-tolerant, distributed,multi-tier Java software, based largely on modular components running on an application server.

The Java EE APIs includes several technologies that extend the functionality of the base Java SE APIs.

javax.ejb --The Enterprise JavaBean's 1st and 2nd API defines a set of APIs that a distributed object container will support in order to provide persistence, remote procedure calls (using RMI or RMI-IIOP), concurrency control, and access control for distributed objects. This package contains the Enterprise JavaBeans classes and interfaces that define the contracts between the enterprise bean and its clients and between the enterprise bean and the ejb container.abd.

javax.transaction--These packages define the Java Transaction API.

javax.xml.stream--This package contains readers and writers for XML streams.

javax.jms--This package defines the Java Message Service(JMS) API.The JMS API provides a common way for Java programs to create, send, receive and read an enterprise messaging system's messages.

javax.resource--This package defines the Java Enterprise Edition Connector Architecture API. Java EE Connector Architecture (JCA) is a Java-based technology solution for connecting application servers and enterprise information systems (EIS) as part of enterprise application integration (EAI) solutions.

javax.faces.component.html--This package defines the JavaServer Faces(JSF) API. JSF is a technology for constructing user interfaces out of components.

javax.persistence--This package contains the classes and interfaces that define the contracts between a persistence provider and the managed classes and the clients of the Java Persistence API.