Fun fact - if you don’t like Java erasing types by default, you can just pass them along manually yourself. There’s a bunch of ways to do this, but I’ll just l

Fun fact - if you don’t like Java erasing types by default, you can just pass them along manually yourself. There’s a bunch of ways to do this, but I’ll just leave this one trick here. Instead of: List<Integer> x = new ArrayList<Integer>(); write this: List<Integer> x = new ArrayList<Integer>(){}; Now you’ll be able to ask at runtime and determine it is a subclass of List<Integer>.