Java 8 Map and Reduce doesnt run

Question

I was using Project Lambdas' .map() method to extract some data from a List object. Before, Jdk 1.8 contained Mapper interface but now, I see that it map method gets Function interface. My method usage below:

 List<Nut> nutList =new ArrayList<Nut>();

I've added some items to nutList and im using below method to extract a fields value by getter.

nutList.stream().map(n->n.getShell())

But above n parameter behave like an Object and it doesn't access to original object's method. This usage was normally run with Mapper Functional interface.

Answer 1

Under b75, the following code compiles and runs correctly:

    List<Nut> nutList =new ArrayList<>();
    nutList.stream().map(n -> n.getShell()).forEach(System.out::print);

Perhaps you're using an older version?