Head First book - 99.9999% of all servlets are HttpServlets

[Ls chin]

Hi all,

This is a very newbie question.

In Head First's JSP and Servlet book (2nd edition on pg.44), it says, "99.9999% of all servlets are HttpServlets". I'm wondering, what is the other 0.0001%?

Is it a subtle joke which I didn't get, or is the 99.9999% actually true?

Thank you in advance.

[Ls chin]

There is also a very small errata in the code example on pg. 44.


This line doesn't compile because there is a " before the word text.
"<h1 style="text-align:center>"


This line compiles Ok.
"<h1 style=text-align:center>"


Is it correct?

[Bear Bibeault]

In other words, "don't worry about it".

Posting errata here is not useful. Please report it to the authors.

[Ernest Friedman-Hill]

Originally posted by LS chin:

Is it a subtle joke which I didn't get, or is the 99.9999% actually true?

The servlet API was originally designed to be generic and independent of HTTP, so that it might be used in other contexts as well. Nevertheless, it turns out that nobody used it for anything else.

[Ls chin]

Hi Bear,

Originally posted by Bear Bibeault:
In other words, "don't worry about it".

Thank you for your reply.
I can now progress to read the rest of the chapters without thinking of that 0.0001%!

[Ls chin]

Hi Ernest,

Originally posted by Ernest Friedman-Hill:
The servlet API was originally designed to be generic and independent of HTTP, so that it might be used in other contexts as well. Nevertheless, it turns out that nobody used it for anything else.

Oh, I see...

Thank you for the explanations!

[Bert Bates]

Hi,

I'd like to clarify what Bear said about errata. Personally, we prefer it if you'd start a new thread with a title like:

"Possible error in chapter X of HFSJ..."

Sometimes ranchers find real errors and sometimes the discussion reveals a wrong concept on the reader's part so we like it if you start out by saying "doubt" or possible error".

Thanks,

Bert