Fetching row and return as array

Question

I am trying to retrieve the results from a query of my Oracle 9i database. In every call it should retrieve a single row from the results and returns it as an array, where each field of the row is in an array key.
My attempt but it doesnt give me any data:
//get userParameter here etc.. while (rs.next()) { String inf []; rs = stmt.executeQuery("select * from Customers where ID = " + userParameter); String firstname = ""; String lastname = ""; if(inf.equals(getParameterValues(rs)) {   out.write(inf[firstname]);   out.write(inf[lastname]); }

Answer 1

Evergrean wrote:
I am trying to retrieve the results from a query of my Oracle 9i database. In every call it should retrieve a single row from the results Are you sure that the query always results in a single row?
and returns it as an array, where each field of the row is in an array key.No, not every field. Just the primary key. Makes no sense.
My attempt but it doesnt give me any data:
//get userParameter here etc..
while (rs.next())
String inf [];
rs = stmt.executeQuery("select * from Customers where ID = " + userParameter);
String firstname = "";
String lastname = "";
if(inf.equals(getParameterValues(rs)) {
out.write(inf[firstname]);
out.write(inf[lastname]);
I'd do it like this:
(1) Start with a Customer class, with id, firstName, and lastName as data members.
(2) Write a DAO that can access a Customer by id:
public class CustomerDao
    private static final String CUSTOMER_SELECT_SQL = "select * from Customers where ID = ?";
    private Connection connection;
    public CustomerDao(Connection connection)
        this.connection = connection;
    public Customer find(Long id) throws SQLException
        Customer customer = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try
            ps = this.connection.prepareStatement(CUSTOMER_SELECT_SQL);
            ps.setLong(1, id);
            rs = ps.executeQuery();
            while (rs.next())
                // map values to Customer here.
        catch (SQLException e)
            e.printStackTrace();
        finally
            DatabaseUtils.close(rs);
            DatabaseUtils.close(ps);
        return customer;
}The rest is left to you.
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