Running a Java class (not a jar) as a subprocess is something I needed to do this week. More precisely, I wanted to spawn a new process from within a test, instead of running it inside the test directly (in-process). I don’t think this is anything fancy or a complex thing to do. But, this is not something I have ever needed to do before and didn’t know the exact code to write.
Luckily, a quick Google search and a few Stack Overflow posts later, I found the answer I needed. Although the answer is there, I am rewriting it here for my own benefit and as well as yours.