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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?
Currently. if I just run the JAR file normally, it only uses a single core.
There is no way to magically make a program (doesn’t matter if it’s packaged in a Java JAR file or some other way) automatically use multiple cores. The program must have been written to make use of multiple cores – there’s no other way.