java - How can I tell if a jar was compiled on a 64bit or 32bit system?

Question

I have a jar but I don't know if it is a .jar for a 64bit system or for a 32bit system. How to find that out?

EDIT: My .jar has native library dependency.

Answer 1

Java bytecode is java bytecode, it doesn't matter whether it was built with a 32-bit or 64-bit JDK and there is no way to figure this out.

I think it does not make any difference to have a jar compiled with 32-bit or 64-bit. It should be machine-independent; unless you have some native library dependency or the java code is directly being compiled to native code.