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Easy Learn Java: Programming Articles, Examples and Tips - Page 16


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Question: I'm just getting into Java and have a simple question: What is J2EE an

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Question: I'm just getting into Java and have a simple question:
What is J2EE and how is it different from Java2?

Answer: Java2 is the name of the current specification of the Java language, the JVM
and all the other things that make up the basics of Java.

Java2 is a specification. It is implemented in the product SDK 1.3 now and soon will be available in 1.4 version (beta now).

Java has 3 subsections:

1. J2EE - Enterprise Edition - for server applications and other back-end...
2. J2SE - Standard edition - for desktop use...
3. J2ME - Micro edition - runs in cell phones, PDAs, and other resource and memory constrained devices, on the order of a 16 bit RISC processor and 128-512k RAM.

The 3 sections listed above are not products - they are specs, and define the tools available, language semantics, standard APIs and optional APIs.

J2ME is a subset of the Java2 spec.
J2EE is a superset of J2SE (+ extra APIs, + functionality).
The difference between J2EE and J2SE is J2EE contains extra APIs
A J2EE application is built using the J2SE tools, the difference is the extra APIs.
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Our older tips: March 22, 2001 - Oktober 21, 2002 read here.
All published and not published on site tips you can find here


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Posted by jalex on Monday, February 03, 2003 (00:00:00) (4588 reads)

IBM releases free 2003 Software Evaluation Kit

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For those of you doing Java development for the Linux OS, can get the free IBM Linux Software Evaluation Kit that has been expanded to 4 CDs for 2003. In addition to the newest levels of DB2 Universal Database, WebSphere Application Server, and Lotus Domino, the 2003 SEK will also include WebSphere Studio Site Developer, WebSphere MQ, Tivoli Access Manager, Linux porting tools, many white papers and tutorials. Sign-up here and get the Linux Software Evaluation Kit mailed to you at no charge.

How to build your next app on Linux - Overview, training, and tech support

Hungry for Linux apps? We're serving up IBM middleware for Linux (DB2 Universal Database, WebSphere Application Server, WebSphere Studio Site Developer, WebSphere MQ, Lotus Domino, Tivoli Access Manager, and more) on a free Linux Software Evaluation Kit (SEK) -- plus

all the free tech support and training you need to get started!

Mail me the free Linux Software Evaluation Kit 2003 (a 4-CD set)

Because the free Linux Software Evaluation Kit was so popular in 2002, we've doubled it to 4 CDs for 2003! Besides the newest levels of DB2 Universal Database, WebSphere Application Server, and Lotus Domino, the 2003 SEK also includes WebSphere Studio Site Developer, WebSphere MQ, Tivoli Access Manager, and more! Of course, users of last year's SEK can still access all the 2002 training resources. However, you can order the new 2003 SEK free of charge and use the new 2003 training resources -- your choice! Tech support remains available for all versions of the SEK.

We'll help you learn Linux, get familiar with IBM middleware and tools for Linux, and develop your new app -- at no charge, and at your own pace. And when you finish your app, tell us about it and we'll mail you a free T-shirt.

If you build applications for commercial sale, we can help you market and sell your application through the developer community for IBM Business Partners, PartnerWorld for Developers. (Learn more about the Linux ISV resources available to you.)


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Posted by Anonymous on Sunday, February 02, 2003 (04:59:57) (4264 reads)

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