ResultSet: Exception: set type is TYPE_FORWARD_ONLY — why?

Question

I have very simple code:

pstat=con.prepareStatement(\"select typeid from users where username=? and password=?\");             
pstat.setString(1, username);         


        

Answer 1

the rowCount variable is not necessary . you are performing two loops on the rs . only the second loop is necessary to get the number of rows which is done by this part of code:

 while (rs.next()){
 typeID=rs.getInt(1); //typeID is the number of rows in the ResultSet
}