putAll not overriden

[MartinBurian]

putAll not overriden

[leventov]

You could change your putAll() signature to accept Map<? extends Long, ? extends Integer>, it looks silly but should always work.

Also, just a quick question. Can I make the keySet() return a LongSet class generated in the same project?

Map's keySet is not a generic Set implementation, it's a special view implementation of Set, which delegates all methods to the parent Map implementation. com.koloboke.collect.set.LongSet which you already use is almost the most specific interface that you can use as keySet() return type. The most specific is HashLongSet. See @KolobokeMap javadocs, find "keySet" on the page.

[MartinBurian]

It indeed worked, thanks for the advice and insights!