Here's A Question Using A Priority Queue and a DLL

Ifm trying to make a method that compares two objects that go into a DLL using a priority Queue. SO in other words lets say i have "5" go ino the DLL and then i have "2" that goes in i need to swap the 2 and the 5. And this goes on for any other objects inserted
     private Comparable minPosition() throws EmptyPriorityQueueException {
     if (size() == 0)
     throw new EmptyPriorityQueueException ("No Elements In The Queue");
     else
now this is what i got so far....but i know that i have toi make to vaiables and compare them? little help please?
Thanks

Um, well im using the adapter class, List. so ive gone a bit further, but im not sure on what to do.....
     private Comparable minPosition() throws EmptyPriorityQueueException {
     if (size() == 0)
     throw new EmptyPriorityQueueException ("No Elements In The Queue");
     while (isEmpty()==false)
     r = ((Comparable)elements.first());
     s = ((Comparable)elements.next(elements));
then i can make r=s and make s serach for the next element,?
Can the experienced programmers help me out? Doesn't seem to be a tuff question.

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A; See above.
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http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2960/12225see/scg/swqos.htm#wp1161845
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Attachments:
6225 Pinout.png ‏107 KB

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Here's an example:
public class Caller
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public class Flight implements Comparable
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makes the queue as high priority and what technical setting(s) makes the queue as low priority
queue.
Thanks
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i Michal
I am talking abt queue prioritization on Integration eninge only.
I am good with queue prioritization and am able to successfully implement
the same. We are using only PI7.0.
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Your answer:
how the system reacts to new messages if almost all queues are already blocked
for some types of messages
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public class PriorityQueue<K>{
private int size;
Node first;
//Post: A class to store data, key and next to be used in the PriorityQueue
protected class Node{
Comparable key;
Object data;
Node next;
Node(Comparable k, Object d, Node n){
key = k;
data = d;
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Pretty much as Stefan says. Here's some code:
public class PriorityQueue<K extends Comparable<K>, D> {
private int size;
private Node first;
// Post: A class to store data, key and next to be used in the PriorityQueue
protected class Node {
    K key;
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    Node(K k, D d, Node n) {
      key = k;
      data = d;
      next = n;
// Post: Creates an empty queue.
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// Pre: size() >= 1
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// Pre: size() >= 1
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public K peekKey() {
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public void insert(K key, D data) {
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In the process of using a Priority Queue the question came up ...I don' t know why.The Javadoc clearly specifies that 'ties are broken arbitrarily'.
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is there any way to predict the order in which equally prioritized elements will be removedNo.
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