Ordered Multiple Selection rows from Custom Table in ADF

Recently , i had one requirement and that demands multiple row selection from Custom Table (The source of the table is from Managed Bean - java class objects).

I was trying to get the selection details using , Table.getSelectedRowKeys().iterator();
after i was iterating through that to get all the rows.

Iterator iter = table.getSelectedRowKeys().iterator();
            while (iter.hasNext()) {
             
               " get details of each row
                 add rows to DataList object."
            }

But after this depending on the Selection rows i was doing some custom logic ,
i was thinking like what ever the order i select in the table , it gives the selected rows from top to bottom.

But when i look into the Data , its not like that.
its not following any order for sake.

Then i thought , why can't i sort that result. and introduced the below logic  and that solves all confusion from this RowKeySet.

Collections.sort(DataList,COMPARATOR);


Defintion of COMPARATOR  is  :

    private static Comparator COMPARATOR = new Comparator()
        {
        // This is where the sorting happens.
            public int compare(GroupDataBean o1, GroupDataBean o2)
            {
                return o1.getIndex() - o2.getIndex();
            }
        };

Hope this will useful.