Collect Lines using Multimap Collector

Question

Is there a way to covert the below to using collectors yet?

List lines = getLines();

Multimap multimap = ArrayListMulti         


        

Answer 1

You can use Multimaps.toMultimap collector:

ListMultimap<String, String> multimap = lines.stream()
        .collect(Multimaps.toMultimap(
                l -> l[0],
                l -> l[1],
                ArrayListMultimap::create
        ));

Or if you don't need mutability, use ImmutableListMultimap.toImmutableListMultimap collector:

ListMultimap<String, String> multimap = lines.stream()
        .collect(toImmutableListMultimap(l -> l[0], l -> l[1]));