Starting a jar with double click starts in 32bit JVM, but from console in 64bit JVM

Question

Since I'm using native libraries I have different JARs for 32bit and 64bit platforms. Now when there are two JVMs installed on the system, one 32bit and one 64bit I face this behaviour:

Double clicking the 32bit JAR -> works

Double clicking the 64bit JAR -> App doesn't start

Starting the 32bit JAR from console -> Error: This Java instance does not support a 32-bit JVM.Please install the desired version.

Starting the 64bit JAR from console -> works

On Mac I can start the 32bit JAR from console, when adding -d32 to the command. But on Windows, this doesn't work.

I expect, that on a system, where a 64bit JVM is installed, the JAR should start in 64bit JVM, no matter if started by double click or via console.

I there a way to accomplish that?

Answer 1

Check where the PATH environment variable points to. I think you will find that it points to your 64-bit JVM, as opposed to the default application associated with .jar files, which will probably be a 32-bit JVM on your system. Align those two values, and you should be fine.