I need some help with a JTable that takes 12 months of rainfall data and sums them into a yearly value. I need some help with: 1) When I go back and edit a column it appends my value and does not overwrite the current content. 2)If I change a value the value is "not updated," until I leave the cell. Is there a way to programaticlly leave a cell or enter a specific cell? I tryed grabFocus with one of the buttons and this worked, except the total did not accept the value that I just changed. Thanks...Ronnie