Answer by Ryan Delucchi for How does the Java 'for each' loop work?

The Java "for-each" loop construct will allow iteration over two types of objects:

• T[] (arrays of any type)
• java.lang.Iterable<T>

The Iterable<T> interface has only one method: Iterator<T> iterator(). This works on objects of type Collection<T> because the Collection<T> interface extends Iterable<T>.