iam developing a small app. using swing and Data Base .. say there is a table called Country with 3 columns as A, B, C .. i want to populate the B column in the combo .. but internally i will be using the field A or C corresponding to the item selected in combo.. i might do it using a multidimentional String. but in case there are many columns it will not be good to use Strings .. so i should use Vector, but how ?? can u pls help me ..