MultiMap vs MultiValue Map

Question

At one place i have to use a map with many values mapped to a single key, so i was wondering whether there is any significant performance distinction between using H

Answer 1

I'd recommend to use google collections if you want to use a more convenient implementation of a Multimap. In case you don't want to introduce a new dependency, HashMap> should do the trick which is pretty much what apache.collections HashMultiMap does.