Java AbstractList.iterator() is a method in the Java AbstractList class that returns an iterator over the elements in the list. The iterator allows sequential traversal of the list elements in a forward direction. Introduced in Java 1997 with Java 1.2, iterator() is essential for iterating over collections in a structured and type-safe manner, especially in for-each loops.

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