Drag/drop into JTable inside JScrollPane

Hello,
I have a table inside a JScrollPane. I can set the table as the DropTarget by the command:
new DropTarget(table,fileDropTargetListener);
but I cannot set the JScrollPane be the DropTarget by the same command.
the problem is that: I cannot set the table to fit the JScrollPane by the command setsize(scrollPane.getSize() ), setPreferedSize(scrollPane.getPreferedSize()), (don't know for what reason, they don't work to fit the scrollpane), therefore when user drags an item to the JScrollPane but outside the table, the drag gesture doesnot display.
Please anyone help me how to solve this problem. Thank you,
fantabk

Yes, I use custom cell renderer and cell editor for ParentTable, which returns NestedTable.
DnD turned on for the ParentTable, so when the NestedTable is active (some cells selected in it) it receives DnD events, which are turned off for it, and DnD doesn't work.
Possible solution is to turn DnD for NestedTable (not for ParentTable), and i'll do this if it is impossible to make it work in current configuration.
So the question is � is this possible do not pass DnD event to NestedTable ?

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Drag/drop into JTable inside JScrollPane

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