How to retrieve value for specific column in Arraylist with resultset

Question

I would like to retrieve the data for the 5th row with the help of resultset.getDouble() after I have set the SQL queries. May I know is it possible to set to retrieve the value from specific column?

Data class:

data class BudgetList(
var bdCategory: String = "",
var bdAmount: Double =0.00,
var bdDate: String = "",
var bdNote:String ="",
var bdSpent: Double = 0.0) : Parcelable{}

SQL Queries:

 "SELECT SUM(eAmount) as spentAmount from Expenses JOIN Budget ON Expenses.Category = Budget.Category where Expenses.Username = '$cUser'AND eMonth = '$month' AND eYear = '$year' GROUP BY eMonth, eYear"
            statement = connection!!.createStatement()
            var rs : ResultSet = statement!!.executeQuery(sql)

            while (rs.next())
            {
                var amount : Double = rs.getDouble("spentAmount")

            }
            rs.close()
            statement!!.close()