sql = "select * from tbl_setnumber";
pt = conn.prepareStatement(sql);
rs = pt.executeQuery();
if (rs.next()) {
if(tblSetNumber==null){
tblSetNumber=new TblSetNumber();
tblSetNumber.setId(rs.getInt("id"));
tblSetNumber.setSetNumber(rs.getInt("setnumber"));
}
}