Something like 'contains any' for Java set?

Question

I have two sets, A and B, of the same type.

I have to find if A contains any element from the set B.

What would be the best way to do that without iterating

Answer 1

I use org.apache.commons.collections.CollectionUtils

CollectionUtils.containsAny(someCollection1, someCollection2)

That is All! Returns true if at least one element is in both collections.

Simple to use, and the name of the function is more suggestive.