Make Sence of Java and its Acronyms

Posted on 2011-09-08
Last Modified: 2012-05-12
Hi Experts,

   I am a software engineer with 10+ years of Microsoft programming experience.  VB, VC++, .NET, etc.  I am currently trying to teach myself Java and I have the hardest time making sense of the basics.

Here's what I think I know:

When I write code I create simple text files (.java).  Then I use something to compile it into bytecode files (.class) and then these bytecode files are interpreted at execution time by an OS specific Java Virtual Machine.

Here are my questions:

Am I correct in my above understanding?
What do I use to compile my .java files?
Is there a difference between JRE and JVM?
What is the difference between JDK and Java SDK?
Does the JDK contain both the compiler and the JVM?
When I download and install an IDE like Eclipse, does that also install the compiler and the JVM?
What is a Java Application Server?

Why does the Java community insist on having 15 different acronyms/names for the same piece of software and/or technology?  ¿

I know that these are a lot of questions but they should be rather simple for an expert.

Question by:axnst2
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 7
  • 2
LVL 47

Accepted Solution

for_yan earned 500 total points
ID: 36503925
Yes you are correct

You use compileer javac which comes wityh JDK (development kit) not JRE (runtime kit)

JRE and JVM more or less the same - JRE - the whole environmet, files, directory structure, etc.
JVM - usually the process which is running and interpreting

Yes, JDK contains compiler

No, you should install JJDK separately from Eclipse form Oracle website

LVL 47

Expert Comment

ID: 36503945

TYhat's where you download Java

You can download Java bundled with NetBeans bexcause NetBeans is developed by the same Oracle,
but for Eclipse you download independently and you need to download JDK separately

LVL 47

Expert Comment

ID: 36503950
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

LVL 47

Expert Comment

ID: 36503989

Java is not so strictly controlled by one company like MS stuff, so the number of names and acronyms
maybe a little bit bigger - compare democracy with totalitarian society and you'll find much more diversity in everytihing
in democratic state, including the naming. Well, some inconvenience, but not too big a price to pay for the freedom.
LVL 47

Expert Comment

ID: 36504083
I by no means  meant to offend anyone by my previous remark - after all in some cases more authoritative power is indeed more effective.

Author Comment

ID: 36504541
No apologies necessary!  I think it was a very good comparison!

I understand that I am trading some things for others when leaving the proprietary world and i am OK with that!  No one is forcing me to do it, right?  :)  I just wanted to make sure that I got my facts straight!  Thanks for your help!

Author Closing Comment

ID: 36504545
LVL 47

Expert Comment

ID: 36504555
You are always welcome..
And thanks for your nice attitude.

Featured Post

On Demand Webinar: Networking for the Cloud Era

Ready to improve network connectivity? Watch this webinar to learn how SD-WANs and a one-click instant connect tool can boost provisions, deployment, and management of your cloud connection.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
This theoretical tutorial explains exceptions, reasons for exceptions, different categories of exception and exception hierarchy.

717 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question