Examples of java.util.Queue.peek()

java.util.Queue.peek()
Retrieves, but does not remove, the head of this queue, or returns null if this queue is empty. @return the head of this queue, or null if this queue is empty

    
    List<PDGNode> processed = new ArrayList<PDGNode>();
    Queue nodes = new LinkedList();
    nodes.offer(this.m_startNode);
    
    while(nodes.peek() != null)
    {
      PDGNode node = (PDGNode) nodes.remove();
      processed.add(node);
      
      s += "\n Begin PDGNode: " + node;

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        } catch (AsynchronousCommandException e) {
            LOG.log(Level.SEVERE, "Unable to access the cache to retrieve commands. ", e);
        }
        Object object = null;
        while (true) {
            object = queue.peek();
            if (object == null) {
                break;
            }
            String uid = (String) object;
            try {

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   * in the queue.
   */
  public void dequeueIfNotDoneYet(Element elem, String name, Object object) {
    @SuppressWarnings("rawtypes")
    Queue queue = queue(elem, name, null);
    if (queue != null && object.equals(queue.peek())) {
      dequeueCurrentAndRunNext(elem, name);
    }
  }


  protected void replacequeue(Element elem, String name, Queue<?> queue) {

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  private void stop(Element elem, String name, boolean clear, boolean jumpToEnd) {
    @SuppressWarnings("rawtypes")
    Queue q = queue(elem, name, null);
    if (q != null) {
      Object f = q.peek();
      if (clear) {
        q.clear();
      }
      if (f != null) {
        if (f instanceof Function) {

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