title: How do I run a jar file in multiple threads?
body: <p>I need to run an executable JAR file in multiple threads/cores. The JAR file does not implement Runnable. I've been looking for a way to do that and haven't found one. Is it possible to make a JAR file use multiple threads/cores without having access to the source code?</p>
  
  <p>Currently. if I just run the JAR file normally, it only uses a single core. </p>