How to create an order list??

Question

Hi.
I'm using <h:selectManyListbox> to show data.
I do it using the next code:
I create the arrayList with values from datatable
ArrayList<SelectItem> arrayList = new ArrayList<SelectItem>();
while (result.next()) {
SelectItem item = new SelectItem();
item.setValue(result.getString("ID"));
item.setLabel(result.getString("Description"));
arrayList.add(item);
Then I translate to SelectItem[] myListItems using a function:
myListItems= arrayList2SelectItem(arrayList);
where I have defined:
public SelectItem[] arrayList2SelectItem(ArrayList<SelectItem> arrayList) {
          SelectItem[] result = new SelectItem[arrayList.size()];
          arrayList.toArray(result);
          return result;
But what I want to do is create myListItems sorted.
I have tried differents ways with treeMap, treeSet, but I can be able to make the transformation like I do in arrayList2SelectItem
So, my idea is:
1.- Create a treeMap, so I have the values sorted.
2.- Translate to SelectItem[] myListItems; (here is where I stopped)
Does anybody knows how to achieve this??
Thanks

Answer 1

Hmmm, I think I have been confused on the subject. (I thought you could do as you say, failed and changed my mind) Now I find it works.. You are correct. 8-)
e.g.
       Set set = new TreeSet(new Comparator() {
            public int compare(Object o1, Object o2) {
                return ((byte[]) o1)[0] - ((byte[]) o2)[0];
        set.add(new byte[]{1});
        set.add(new byte[]{2});
        set.add(new byte[]{3});