Collectors.to* signatures

[Olexandr Demura]

+1.
Part of java community already adopted old pretty upper-bounded wildcard to
mark unmodifiable collections,
despite common guideline to avoid wildcard as a -plague- return type.
http://docs.oracle.com/javase/tutorial/java/generics/wildcardGuidelines.html

2013/4/19 Michael Nascimento <misterm at gmail.com>

> Hi guys,
>
> Just got bitten by the fact toList() *might* produce an immutable list.
>
> Since we don't have immutable collections as types in Java, I wonder
> if the old ugly List<? extends T> wouldn't be a better return type,
> effectively preventing people from doing what I did.
>
> Regards,
> Michael
>
>