Having a Multimap sorted on keys only in Java

Question

I would like to have a c.g.c.c.Multimap that is sorted based on keys only. The values shouldn\'t be sorted. I\'ve tried to build something with guava\'s T

Answer 1

You can do it with TreeMultimap if you use Comparators.

Create a Comparator for the key type and the value type (MyObject?). Then use create(Comparator keyComparator, Comparator valueComparator) to make the map.

The benefit of using a Comparator over implementing Comparable is that you can make the Comparator specific to the situation that you want with the map and it doesn't effect your object in general. As long as your Comparator is consistent with equals it can do whatever you want.