Collectors inventory

[Brian Goetz]

Update on this:

On 2/21/2013 6:01 PM, Brian Goetz wrote:
> As I promised a long time ago, here's an overview of what's in
> Collectors currently.
>
> There are 12 basic forms:
>   - toCollection(ctor)
>   - toList()
>   - toSet()
>   - toStringBuilder()
>   - toStringJoiner(delimiter)
>   - to{Long,Double}Statistics

To this group, we'll add:

   toMap -- two forms (explicit map ctor and not)
   toConcurrentMap -- two forms (same)

and get rid of the four forms of joiningWith in each of Collectors and 
ConcurrentCollectors.

This leaves us with the more complex mess of:

>   - groupingBy(classifier, mapFactory, downstream collector)
>   - groupingReduce(classifier, mapFactory, mapper, reducer)
>   - partitioningBy(predicate, downstream collector)
>   - partitioningReduce(predicate, mapper, reducer)

for which a new story is being prepared, stay tuned.