You'll have to get the table's model(JTable.getModel()). If this is a DefaultTableModel, you can use the addRow() method, which takes either an Object array or a Vector. (You'll need to cast the TableModel that is returned from JTable.getModel() into a DefaultTableModel if you want to do this. If you are using some other TableModel that doesn't inherit from DefaultTableModel, you'll need to talk to whoever made the class...)
Write once, run anywhere, because there's nowhere to hide! - /. A.C.