Checking for Empty ResultSet

Question

I am doing an insert into a table, but only if the first name and last name are not already in the table...
i tried using the wasNull() method but that didn't work,
Here's the code, I'm sure you'll be able to get the jist of it when you see it...
            Statement SQLStat = ourSiteConn.createStatement();
            String SQL = "SELECT * FROM tblCustomer WHERE FName = '"+FName+"' AND LName = '"+LName+"'";
            rs_CustomerCheck = SQLStat.executeQuery(SQL);
            while (rs_CustomerCheck.next())
                FNameChk = rs_CustomerCheck.getString(2);
                LNameChk = rs_CustomerCheck.getString(3);
            if (rs_CustomerCheck.wasNull())
                 //Code for this condition here
            else
                //Code for this condition here
            }What i'm trying todo is search my DB for the name that the user enters, if it doens't find anything in the DB it should return true right? which would make that work..i think...
Any idea's would be Much appreciated
~Jon

Answer 1

After you do your query, you want to find out if it returned zero records. If it did, then trying to get the fields from the records is pointless (at least in your current design). So just check to see if you can read the first record, and if you can't then there weren't any records...
String SQL = "SELECT * FROM tblCustomer WHERE Name = '"+FName+"' AND LName = '"+LName+"'";
rs_CustomerCheck = SQLStat.executeQuery(SQL);
if (! rs_CustomerCheck.next()) {
// query found no records