If you explain the problem in more detail, it will probably attract more replies.
Sounds clear enough to me There's a reference to a file called results.jsp, but the source is not page 738. I don't own the book so I can't reply though... And Chinmaya already replied anyway
I assumed there was a related question like 'I attached a request attribute in the servlet and want to know how results.jsp can use blah blah'. Looks like the question is more about the book and a missing code snippet, so I guess Chinmaya's answer should suffice