functional programming - Collect Lines using Multimap Collector -


is there way covert below using collectors yet?

list<string[]> lines = getlines();  multimap<string,string> multimap = arraylistmultimap.create();  lines.foreach(line ->  multimap.put(line[0],line[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 don't need mutability, use immutablelistmultimap.toimmutablelistmultimap collector:

listmultimap<string, string> multimap = lines.stream()         .collect(toimmutablelistmultimap(l -> l[0], l -> l[1]));

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