Why the diamond operator does not work here?

[Rémi Forax]

Le 28/09/2010 18:23, Ulf Zibis a écrit :
>    Try something like (not sure if it would work):
>
> 5         Map<String,? extends List<String>>   map = new HashMap<>();
>
> -Ulf
>    

See slides 99+ from the presentation of Joe and Maurizio
http://blogs.sun.com/darcy/resource/JavaOne/J1_2010-ProjectCoin.pdf

Rémi