Best way to determine openjdk jvm

[Michael Hall]

I am looking at...
Mac OS X Port Using jsadebug, jinfo, jmap
https://wikis.oracle.com/display/OpenJDK/Mac+OS+X+Port+Using+jsadebug,+jinfo,+jmap

Which appears to require a openjdk specific signing certificate, or sudo.
Assuming you wanted to provide the cert, I would further assume you would still need to determine at runtime if you had the features available - meaning a openjdk runtime.
Would checking this system property be the best, recommended, way to do that?
java.runtime.name=OpenJDK Runtime Environment