Stream.toArray()

[Remi Forax]

Restarting a thread that ends without clear winner.

Currently, Stream.toArray() is specified as:
   Object[] toArray()

which is not what users want, given the lack of reified generics and the 
fact that it's usually hard for a user to predict the number of elements 
of a Stream,
the best signature seems to be:
   <A> A[] toArray(Class<A> arrayClass)
with arrayClass.isArray() returning true and 
arrayClass.getComponentType().isPrimitive() returning false
(or if you prefer Object[].class.isAssignableFrom(arrayClass) returning 
true)

example of usage,
   Person[] coolPersons = 
persons.stream().filter(person#isCool()).toArray(Person[].class);

cheers,
Rémi