The Collections Framework organization

Implement the Iterable interface to enable iteration over objects, as it serves as the super interface for all Collection hierarchy members and was introduced in Java SE 5 alongside the for-each pattern. While not part of the Collections Framework itself, Iterable allows instances to be used with this loop structure by providing an Iterator. For storing elements, leverage the Collection interface, which models common behaviors shared by List and Set. Utilize Collection operations to add or remove elements, test for element presence, determine size or emptiness, and clear content. Perform set operations such as union, intersection, and complement. Access elements via iterators or by creating parallel streams. These operations are also available on List and Set. Scope: Java. Reviewed October 4, 2026.