I stumbled across this awesome resource by @RichardB122, and it just needed a small change to work without a deprication warning in Java 9+. I also fixed a bug that @Jmbeard96 pointed out in the comments of the original Gist that the class cannot set the value of 351 XP due to an unhandled case in the if statements. I hope this is useful to someone - it's definitely been useful to me in my personal plugin!
-Ash