Java is the only language with built-in question types that I haven't personally used in teaching, because we changed from Java to Python for first-year teaching about the time I started developing CodeRunner. The three built-in question types (write-a-method, write-a-class and write-a-method) were just ones that I thought might be useful. Had I tried using them in teaching I would have undoubtedly come up with extra and/or different ones.