Java lambda returning a lambda

Question

I am trying to do what seems to be a relatively basic thing in the new JDK 8 land of functional programming, but I can\'t get it to work. I have this working code:

Answer 1

I ran into this same issue and was able to solve it by explicitly specifying the generic type-parameter to map like so:

List> checks = l.stream().
   >map(n -> () -> {
      System.out.println(n); 
      return null;
   }).
   collect(Collectors.toList());