I am developing a SWING application in JDeveloper11.
There is a jTable that needs to be enabled for edit by the user.
The real critical thing is that user must only be able to insert positive doubles or natural numbers (zero accepted) in all editable cells (a few are set to be non-editable), except for the top row. He should be able to insert whatever he likes in the top row- it's a description, not to be used for calculations. How can I solve this?