Symmetric difference of two sets in Java

Question

There are two TreeSets in my app:

set1 = {501,502,503,504}
set2 = {502,503,504,505}

I want to get the symmetric difference of thes

Answer 1

Those looking for set subtraction/complement (not symmetric difference/disjunction) can use CollectionUtils.subtract(a,b) or Sets.difference(a,b).