Can you pls tell me how to refresh a combo box.I have 2 combo boxes that display different types of data depending on 2 other options that they select. When they select data type A ,then B then back to A again,the list box still holds data from data type B.So the selected item is invalid.Ive tried to refesh the combo box by doin revalidate,validate and SwingUtilities.updateComponentTreeUI(combo) but this doent work. Does any one have any ideas? thanks