There is a lot of ceremony in Java. If I want a single polymorphic function I'll create an interface and a bunch of classes to implement it, instantiate those

There is a lot of ceremony in Java. If I want a single polymorphic function I'll create an interface and a bunch of classes to implement it, instantiate those classes and pass them to where they need to be. In a functional program, I'll just create the function and pass it around anonymously if needed. The function will in itself will likely be simpler than the Java equivalent and stateless. There will also be less DTO type class code for carrying around dumb collections of data, replaced with simple records and lists. I'm not at the stage where functional programming has really clicked for me, but after writing some Clojure and Haskell recently, the sheer amount of code you have to type in in Java to express yourself is really starting to bug me!