What if I need to quickly search not only by the key but also by value. In other words, is there a construction like key-key as opposed to key-value?
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What if I need to quickly search not only by the key but also by value. In other words, is there a construction like key-key as opposed to key-value?
Sounds like you want a bimap – I’d use the implementations in Guava if I were you; there’s a
BiMapinterface, and various implementations such asHashBiMapandImmutableBiMap.Note that you generally view a
BiMapfrom one “side” (K1 to K2), and just callinverse()to get the opposite view of things (K2 to K1).