Java AbstractSet.iterator() is a method in the Java AbstractSet class that returns an iterator over the elements in the set. It provides a way to traverse through the set's elements without modifying the set. Introduced in Java 1997 with Java 1.2, iterator() is commonly used in Java applications to loop over the elements of a set in an ordered or unordered fashion, depending on the type of set being used.

https://docs.oracle.com/javase/8/docs/api/java/util/AbstractSet.html