title: Get Random Element from Collection
body: <p>I have a <code>Collection&lt;Obj&gt;</code> how do I get a random <code>Obj</code> from it?</p>
  
  <p>I've checked the <a href="http://docs.oracle.com/javase/7/docs/api/java/util/Collection.html" rel="noreferrer">docs</a> and there doesn't seem to be a way, since iterator is the only way to access the collection. Do I have to iterate over it to get a random object!?</p>