JTable Input Verifier

Question

I am trying to create a simple Input Verifier for a JTable. I ended up with overriding the method: editingStopped(). The problem is that the event does not include informations

Answer 1

First: input validation on JTable editing is not well supported. A couple of comments

• tableChanged in a TableModelListener is not a good place to do validation, at that point in time the change already happened (the model notifies its listeners of the fact)
• as a consequence, whatever validation (verify) method hook you choose, never-ever talk back to the model, you'll end up in an infinite loop (as you have seen)
• application-provided CellEditorListeners are rather useless because a) there's no guarantee about sequence of notification (JTable might or not have already updated the model) b) the life-cylce of an editor is ill-defined

After all those (incomplete, unfortunately ;-) no-nos, a little hope: best bet is to implement a custom CellEditor which does the validation in stopCellCellEditing: if the new value isn't valid, return false and optionally provide a visual error feedback. Have a look at JTable.GenericEditor to get an idea of how that might be done