使用JNI时与64位和32位混淆

Question

I have a Java project running under windows. It uses several native functions from a .DLL file via JNI. Everything works well under 32bit windows.

In order to support 64bit windows, I need to deal with the following questions first:

1. Can I load a 32bit DLL under 32bit VM in 64bit windows?
2. Can I load a 32bit DLL under 64bit VM in 64bit windows?
3. Can I load a 64bit DLL under 32bit VM in 64bit windows?
4. How can I know which DLL file to load?

Thank you very much!

Answer 1

A 64-bit OS can run a 32-bit or 64-bit application.

A 32-bit application can only load 32-bit DLL or shared libraries.

A 64-bit application can only load 64-bit DLL or shared libraries.