private void data_charges() { // String date = lb_date_baptism.getText(); int row = tbl_cust.getSelectedRow(); if (row < 0) { return; } String num = tbl_cust.getModel().getValueAt(row, 1).toString(); // JOptionPane.showMessageDialog(null, num); loadData_charges(S2_customers.ret_charges(num)); compute_charges(); }