Java8 method reference used as Function object to combine functions

Question

Is there a way in Java8 to use a method reference as a Function object to use its methods, something like:

Stream.of(\"ciao\", \"hola\", \"hello         


        

Answer 1

You can use a cast

Stream.of("ciao", "hola", "hello")
        .map(((Function) String::length)
                .andThen(n -> n * 2))
        .forEach(System.out::println);

prints

8
8
10