Chapter 01: Introduction to J2EE

This chapter gives an overview of the what & why of J2EE. In Tamil language, i have interactively explained assuming that my best friend is sitting next to me.

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J2EE is the abbreviation of Java 2 Enterprise Edition.

The jargon 'Java' can be broke up into THREE main components.

1. J2SE : Java 2 Standard Edition
2. J2EE : Java 2 Enterprise Edition.
3. J2ME : Java 2 Micro (or Mobile) Edition.

J2SE:

J2SE is the basic form. This is the actual programming language. The other two are actually

derivatives. It's also termed as "core java" or "pure java" in some locales. Basically used to create small scale applications that runs on a CUI. Implementation of "Applets" concept helps create GUI based applications.

Note:

CUI is Character user interface. It's like the black-white DOS prompt where you can interact with the system only via characters. GUI is Graphical user interface. As the name indicates, "Graphical", you can control the applcation through mouse & clicking buttons, etc.

J2ME:

Simply put, This edition is used for creating operating systems, softwares & games for mobiles.

J2EE:

This is what we are gonna dig in & get our hands dirty. The real deal.

Till version 1.4, it is named J2EE 1.4. Ever since 1.4, it's termed JEE these days.

Latest version, 1.5 is named JEE 5. And FYI, JEE 6 is released recently.

Normal Java (termed J2SE) is a programming language.

J2EE is Not a Programming language or a Software.

J2EE is officially termed as a "Tehnology".

For me,

JEE is

1. J2SE + Some API's.
2. Server programming language.
3. Used for building java - based web applications.
4. Supports Dynamic web page creation thorugh 'JSP' & 'Servlets' concept.

NOTE:

PHP, ASP (from Microsoft) are other counterparts for JSP. These languages are scripting languages. They are all used for building dynamic web applications.

Watch the chapter as an interactive video in tamil.

 

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