title: filling a collection using an iterator
body: <p>Google Collections has an <a href="http://google-collections.googlecode.com/svn/trunk/javadoc/com/google/common/collect/Iterables.html" rel="nofollow noreferrer">Iterables</a> utility class for taking in a collection and iterable and putting all the elements from iterable into the collection, called <code>addAll</code>.   Is there something similar when all you have is an iterator?</p>