static void tableEnableDrag(final JTable table, TransferHandler th) {
  if (table.getDragEnabled()) {
    print("Table drag already enabled");
    ret;
  }
  table.setDragEnabled(true);
  table.setTransferHandler(th);
  table.addMouseListener(new MouseAdapter {
    @Override
    public void mousePressed(MouseEvent e) {
      if (e.getButton() == 1 && e.getClickCount() == 1)
        table.getTransferHandler().exportAsDrag(table, e, TransferHandler.COPY);
    }
  });
}