// Выбрать коды валют из таблицы CURRENCY в вектор
  static void selectCurrency () {
      try {
          Statement stmt = conn.createStatement ();
          ResultSet rset = stmt.executeQuery (
                           "select id_currency from currency");
          while (rset.next ()) {
              cv.addElement (rset.getObject (1));
          }
      }
      catch (SQLException sqle) {
          System.out.println ("SQL exception:" + sqle.getMessage ());
          System.out.println ("SQLState:"      + sqle.getSQLState ());
          System.out.println ("VendorError:"   + sqle.getErrorCode ());
          System.exit (-1);
      }
      catch (Exception sqle) {sqle.printStackTrace ();}
  }