title: LinkedList different implementations
body: <p>I have seen 2 valid declarations of the <code>LinkedList</code> class in <code>Collections Framework</code> in Java.</p>
  
  <ol>
  <li>LinkedList a = new LinkedList();</li>
  <li>Queue a = new LinkedList();</li>
  </ol>
  
  <p>What exactly is the difference between these 2 implementations?</p>