Terms: JDK - JVM - JRE ??

[Ja vardhan]

Hi Folks,

Pls tell me the exact functionalities of the JDK,JVM and JRE.

Whats the relationship between them?

Thankx.

[Ilja Preuss]

What is your current understanding?

[Ja vardhan]

Actually I dont know any thing about these terms. I am just simply wrting and compiling java files but didnt understand the internal roles of these things.

Pls tell me clearly.

Thanks.

[Ernest Friedman-Hill]

A JVM (Java Virtual Machine) is a simulated computer on which Java bytecode runs. A Java Runtime Environment (JRE) is a JVM plus all the standard Java libraries. A Java Development Kit (JDK) is a JRE plus developer tools like javac, jar, javah, javap, etc.

I'm moving this to Java in General (Beginner.)

[Naren Chivukula]

Hi,

You told me that JRE is JVM + some java libraries. Can you tell me what are those libraries?

Regards,
Narendranath

[Hentay Duke]

Ernest didn't say "some", he specifically said "Java Runtime Environment (JRE) is a JVM plus "all the standard Java libraries".

Look up the API and you'll find the standard libraries.
[ June 06, 2005: Message edited by: Hentay Duke ]

[Matt Fielder]

or go to the sun site.
There's complete explanations of what these are and is where I learned about them.

[Layne Lund]

This question has been asked here before. For future reference, you might find our Search Tool very handy. For this particular question I found the following threads that already discuss the answers you are looking for:

http://www.coderanch.com/t/398032/java/java/JDK-JRE
http://www.coderanch.com/t/387427/java/java/jvm

I hope this helps.

Regards,

Layne