Question : Java 64bit and 32bit ?

Hello
I'm a 64-bit windows user, and I want to know what's different between 32bit and 64 bit Java.
If I install 64 bit Java, will be be able to run files compiled on 32 bit system?

Thanks.

Answer : Java 64bit and 32bit ?

One discussion that might help - http://www.coderanch.com/t/384605/Java-General/java/compile-bit-deploy-bit