How to fix Column Index out of range SQLException

When i'm passing a query i'm getting below error.

 Errorno is Nil
 Error String Is Query Problem.....
 java.sql.SQLException: Column Index out of range, 2 > 1.

This is the code in my java method.

PreparedStatement pstm=con.prepareStatement("select period from stu_attendancemaster where classid=? and absentdt>=? and absentdt<=?");
pstm.setInt(1,classid);
pstm.setDate(2,fromdt);
pstm.setDate(3,todt);
System.out.println("qry for prd "+pstm.toString());
rs=pstm.executeQuery();
System.out.println("after qry for prd "+pstm.toString());

if(rs.next())   {
    stame = new Stu_AttendanceMasterEntity(rs.getInt(1), rs.getDate(2), rs.getInt(3), rs.getString(4), rs.getInt(5), rs.getString(6), rs.getTimestamp(7), rs.getString(8), rs.getTimestamp(9),rs.getString(10),rs.getInt(11),rs.getString(12));
}   else    {
    flag=false;
    errorstring=FN + P1 +" Class Name: " + Dep_ClassMasterDB.getClassname(classid) +" From Date: " +DateUtility.displayDate(fromdt,0) +" To Date: " +DateUtility.displayDate(todt,0) +N + V +DNE;
}
}   catch(Exception e)  {
    flag=false;
    errorstring="Query Problem..... "+e;