I have an application which can be run using 64 bit JNI libraries, or 32 bit lib

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Question: I have an application which can be run using 64 bit JNI libraries, or 32 bit libraries depending on the command line parameters. I want to know if there is any way for me to find out if the JVM is running in 64 bit mode (the -d64 parameter was sent to it) or 32 bit mode.

Answer: Run this small program and you will get a long list of System properties...

public class ShowSystemProperties {
public static void main(String[] args) {
System.getProperties().list(System.out);
}
}

One of lines will be
sun.arch.data.model=32
or
sun.arch.data.model=64

Just search for it and you will know which version you are running on. Of course, you can get and analyse in your running program as well.

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