[TheBarret]

Well partially yes thats possible, you can see here how you can wrap arround a process
https://hackforums.net/showthread.php?tid=3738215

That was a minecraft server JAR file that runs inside (or wrapped) the main application as forked process.

[TheBarret]

Hmm... you where not specific in the first post now you start flapping about runpe, i dont see how that is gonna work on a jar files. java apps are compiled bytecode that run on jvm (Java virtual machine). So my awnser is no.