Which JRE type does the client have? (64bit or 32bit)

Hello all,
I'm needing a way to programmatically find out whether the client machine is running a 32bit or 64bit JRE.
The reasoning for this is down to this a 32bit JRE will load only 32bit dll's and a 64bit JRE loads only 64dll's.
Problem occurs when a 32bit JRE is installed on a 64bit machine (64bit Windows), when the customer tries to use the 64bit program it fails because the installed 32bit JRE tries to load 32bit dlls (which arent there as the program is 64bit).
Anyway as the Java code is different (different API for the 32/64 dlls) so I would like to run a check before the program installs that the client has got version that matches their installed JVM.
Thanks in advance!

Examine [os.arch|http://pscode.org/prop/?prop=os.arch] or [sun.arch.data.model|http://pscode.org/prop/all.html?prop=sun.arch.data.model]?
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my question is why does the client need to define
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I can understand why the server needs it, as it is downloading classes
it does not have information about. But why does the client need to specify the codebase

Lets say you have a Remote interface with a method:
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>

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Which JRE type does the client have? (64bit or 32bit)

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