HashMap could be used if you want to give a NAME to each element of the results... I think should be ugly... Maybe could be used if the name of each element is the Primary Key.

I will go out on a limb and guess that you really want to use an ArrayList. The ArrayList is like a Vector, but its methods are not synchronized (for multithreaded access), so it is much faster than a Vector. If I were creating a table, I would use an ArrayList of container objects, each of which represents a row in the table. A nice thing about an ArrayList is that you can use Collections.sort to sort the elements in any way you like.

I would use a HashMap (over the synchronized Hashtable) if my table had only two columns, or if there were one column whose values would serve as the keys for retrieving each row.