final PreparedStatement getOrder = conn.prepareStatement( "SELECT quantity, price, extension FROM orders WHERE custId=?" );
getOrder.setInt( 1, custId );
ResultSet rs = getOrder.executeQuery();
while ( rs.next() )  // note next will be called to navigate to the first result
   {
   int quantity = rs.getInt( 1 );
   int price = rs.getInt( 2 );
   // alternate access by field name
   int extension = rs.getLong( "extension" );
   ...
   rs.close();
   break;
   ...
   }