Hello Viewers, Welcome to J2EE Study Center

Objective

• know why do we build J2EE Applications
• install developing environment and setup server in your local machine
• understand the concept of what servlets is and the role of the database
• how to create a new project and getting to your first web page

First focusing on  "Why do we build J2EE Applications?" before anything else..

What is J2EE is:

 J2EE (Java Enterprise Edition) is actually a collection of technologies and APIs for the Java platform designed to support "Enterprise" Applications which can generally be classed as large-scale, distributed, transactional and highly-available applications designed to support mission-critical business requirements.

Realworld Examples:

Realworld Examples:

Part1

Part2

Scenario :-

1. Server should be able to accept the request from the client. And should be able to send back the response.

2. Server should be able to do some transactions.

3. Server should be able to communicate with the database.

And many more.

Oracle developers have found this issues in an enterprise web application. And they have developed a container called "J2EE" . This J2EE container contains components like JSP/Servlet (for solving issue 1), EJB (for solving issue 2) and JDBC (for solving issue 3) and many more. This J2EE container also contains infrastructure code(example when client sends a request then J2EE should invoke the corresponding Servlet/JSP).