A data model for a combo box. This interface extends ListDataModel and adds the concept of a selected item. The selected item is generally the item which is visible in the combo box display area.
As you can see this is an interface. If you browse further through the API docs, you will notice DefaultComboBoxModel offers the concrete default implementation of this interface.
Check out the API to see how you can use this model to wrap your data.
Essential you need to create an instance of this model and then pass it to the setModel()