Well data constructors are a part of algebraic data types which don't really exist in OOP. Unless you consider the class itself (or an interface) or its constru

Well data constructors are a part of algebraic data types which don't really exist in OOP. Unless you consider the class itself (or an interface) or its constructor as the algebraic data type constructor, and its properties/parameters as the values. I'm not so sure fmap would make semantically as much sense in something like Java as it does in FP.