How to access system registry through java program

Friends
I have to access System registry of Windows 2000 by Java program. I don't know how to access the registry by using java code. Please help me. Else
I want to create a setup file for my application. before setup my application i have to check whether the system has JVM or not. If its not then i have to install JVM first and then my application. so i need to access system registry. please give me a solution for this.
Thanks in advance
Ramesh

I don't know how to access the registry
by using java code. You can't, without using a native interface (JNI type) library.
This is one, there are others, do a Google search:
http://www.bayequities.com/tech/Products/jreg_key.shtml

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