> There isn't all that many plus in their type systems that is not expressible in Java.
Thanks to Turing, anything that is Turing-complete can duplicate any other thing that is Turing-complete. So, yes, you can do all of Haskell's types in Java. That is not a flex.
The kind of Turing completeness certain type systems have is useless beside academic curiosity - look at the vavr library, that’s what I’m talking about. You can have plenty Haskell types without any hacks, except for Monads in Java.