Get Number of Rows returned by ResultSet in Java

Question

I have used a ResultSet that returns certain number of rows. My code is something like this:

ResultSet res = getData();
if(!res.next())
{
    Sy         


        

Answer 1

You could count with sql and retrieve the answer from the resultset like so:

Statment stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, 
                                     ResultSet.CONCUR_READ_ONLY);
ResultSet ct = stmt.executeQuery("SELECT COUNT(*) FROM [table_name]");
if(ct.next()){
   td.setTotalNumRows(ct.getInt(1));
}

Here I'm counting everything but you can easily modify the SQL to count based on a criteria.