private class RowColumnListSelectionListener implements ListSelectionListener {
        public void valueChanged(ListSelectionEvent e) {
            if(!e.getValueIsAdjusting()) {
                int rowIndexEnd = table.getSelectionModel().getMaxSelectionIndex();
                int colIndexEnd = table.getColumnModel().getSelectionModel().getMaxSelectionIndex();
                int row = table.getSelectedRow();
                int col = table.getSelectedColumn();
                String s = "";

                for (int i = row; i <= rowIndexEnd; i++) {
                    for (int j = col; j <= colIndexEnd; j++) {
                        if (table.isCellSelected(i, j)) {
                            Object retrievedVal = table.getValueAt(i, j);
                            s += retrievedVal.toString();
                        }
                    }
                }
                System.out.println(s);
            }
        }

    }