JTree is a Swing component. It doesn't have "columns" so the first sentence is kind of nonsense, but then the rest starts talking about JTable, which does have columns. At any rate it doesn't seem to be about anything but Swing (definitely not
Ant or Maven or any other build tool whatsoever) so I will move it to the Swing column.
It would also help if Dhivya could clarify the question so we at least knew whether it was about JTree or JTable.