Error using toList() of Collectors
Maurizio Cimadamore
maurizio.cimadamore at oracle.com
Thu Jan 10 09:21:04 PST 2013
On 10/01/13 18:12, Venkat Subramaniam wrote:
> Hello everyone,
>
> I'm trying to use the new Collectors class.
>
> List<Integer> numbers = Arrays.asList(1, 2, 3);
>
> //This works
> List<Integer> numbers1 = numbers.stream()
> .collect(toCollection(ArrayList<Integer>::new));
>
> //This does not
> List<Integer> numbers2 = numbers.stream()
> .collect(toList());
>
> /*
> error: incompatible types: inferred type does not conform to upper bound(s)
> .collect(toList());
> ^
> inferred: List<Object>
> upper bound(s): List<Integer>,Object
> 1 error
> */
>
> Is this the expected behavior or am I missing something quite basic here?
>
> Thanks,
>
> Venkat
>
>
Nested generic method calls support is not fully ready (yet). If you
compile with -XDuseGraphInference it should work (do at your own risk ;-)).
Maurizio
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