title: enterQueue, leaveQueue
body: <p>Does anyone have references to examples for enterQueue() and leaveQueue() for the Queue class in Java? I'm trying to do an assignment demonstrating the actions of enterQueue() and leaveQueue() but I can't seem to find anything in the API.. I already did Peek, Poll, and size. That code is attached here, even though I suppose it's not really relevant.</p>
  
  <pre><code>Stack st = new Stack();
         Queue&lt;String&gt; q = new LinkedList&lt;String&gt;();
         String element;
  
         st.push("A");
         st.push("B");
  
         System.out.println("\fInitial Stack contents: "+st);
  
         q.addAll(st);
         st.clear();
  
         Iterator itr = q.iterator();
  
         System.out.println("\nInitial Queue size: "+q.size());
         System.out.println("It contains "+q+" while the stack is now "+st+"\n");
  
         while(itr.hasNext()) {
             String iteratorValue = (String)itr.next();
             System.out.println("Next in queue: "+iteratorValue);
          }
  
         //Peek : Look at value, don't remove it
         System.out.println("\nQueue Peek: "+q.peek());
  
         // Poll : Remove first value from queue
         element = q.poll();
         System.out.println("\nQueue Poll: "+element);
  
         System.out.println("\nQueue Size now: "+q.size());
         System.out.println("Queue remainder: "+q);
  </code></pre>