How do i know if row has been updated?

Hi
Please can someone guide me on how I can determine if my update has been successful. I am currently using the method below but my data is being put into the table but the method rowUpdated() returns false when it should return true.
rs.moveToInsertRow();
rs.updateString("SL_Name", "Antek")
rs.insertRow();
System.out.println("Row updated " + rs.rowUpdated());
Thanxs
Antek

I am using a primary key which is set by ms-sql server and it has the properties not-null auto incrementing. I was using the manual insert function before but then I realised the moveToInsertRow() method so I changed because of the added benefits to my program I can get. Before I was using the following code to see if a row was inserted see below. (I want something similar for the new way I insert data into table please)
======
what i use to use before
======
int numRows= myStatement.executeUpdate(sql);
System.out.println(numRows + " rows updated");
if (numRows > 0)
returnString = "success";
Antek

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