Comparators.comparing(Mapper<R, T>) <was> Re: Heads up: Mapper<T, R> -> Mapper<R, T>

[Henry Jen]

Uh, you are right, it's indeed the return type.

Cheers,
Henry

On Nov 7, 2012, at 1:58 AM, Paul Sandoz <paul.sandoz at oracle.com> wrote:

> On Nov 7, 2012, at 2:11 AM, Henry Jen <henry.jen at oracle.com> wrote:
>> 
>>> all methods that declares a type parameter used as first parameter of a 
>>> functional type should also be declared first.
>> 
>> For example, <T, R> Comparators.comparing(Mapper<R, T>) should be changed.
>> 
> 
> You mean this one:
> 
>    public static <T, U extends Comparable<? super U>> Comparator<T> comparing(Mapper<? extends U, ? super T> mapper) {
> 
> I did not forget this :-) I deliberately left that as is because T is used as a parameter of the return type.
> 
> Paul.
>