what is difference between ListIterator and Iterator
<p>What is the difference between <code>ListIterator</code> and <code>Iterator</code> 
what are the methods in <code>iterator</code> and <code>listiterator</code></p>

<pre><code>Iterator ite = Set.iterator();
Iterator ite = List.iterator();

ListIterator listite = List.listIterator();
</code></pre>
