saving image to a file
Rolf Schaller
I am working on a java program (using AWT) that will read a gif or jpeg
image from an URL and draws it in a Pane. After that it reads some
information from a database and draws something in the pane. This works
quit well.
My question is how do I save the image I have created into a file in gif
or jpeg format. Is it as easy as reading an image? Is there information
on the Web about this?
Thanks Rolf
Michiel de Roo
Marco Schmidt
<scha...@tfd.mw.tu-dresden.de> wrote:
>My question is how do I save the image I have created into a file in gif
>or jpeg format. Is it as easy as reading an image? Is there information
>on the Web about this?
I've listed several libraries that read and write popular image file
formats at
http://www.geocities.com/~marcoschmidt/java-image-coding.html
Regards,
Marco
Ron Baalke
Are there any libraries that can be used inside of applets to save images?
A quick look at the libraries here looks like none of them will work
for applets.
Ron
Marco Schmidt
wrote:
>Are there any libraries that can be used inside of applets to save images?
>A quick look at the libraries here looks like none of them will work
>for applets.
Applets have a general problem of not being able to write files. But
once you changed security settings (registering signed applets etc., I
don't know a lot about them), the libraries should work like any other
piece of Java code. Few of them (if any) use native code, IIRC.
Regards,
Marco
Ron Baalke
>On 26 Sep 2000 16:31 UT, baa...@kelvin.jpl.nasa.gov (Ron Baalke)
>wrote:
>
>>Are there any libraries that can be used inside of applets to save images?
>>A quick look at the libraries here looks like none of them will work
>>for applets.
>
>Applets have a general problem of not being able to write files.
Exactly. Which is why the libraries you mentioned won't work inside
applets.
>But
>once you changed security settings (registering signed applets etc., I
>don't know a lot about them), the libraries should work like any other
>piece of Java code. Few of them (if any) use native code, IIRC.
I've ruled out signed applets since neither Netscape or Internet Explorer
support signed applets.
I ask again:
Are there any libraries that can be used inside of applets to save images?
Ron
canardbw
users machine. The codec I used to save the jpg is included with
Sun's JDK1.3. It is fairly buried in something like
com.sun.java.jpeg.codec or something similar. I use Sun's
plug-in for my applet to provide consistency and to use the newer
version of java.
Just one suggestion that has worked well for me.
Brad
Ben Clifford
>>Applets have a general problem of not being able to write files.
>
>Exactly. Which is why the libraries you mentioned won't work inside
>applets.
[...]
>I ask again:
>Are there any libraries that can be used inside of applets to save images?
So where do you want the images to be saved, if not to a file?
Back to the server that they came from?
--
http://www.ben.custom-access.net/
GPG key: 30F06950. You are encouraged to sign and encrypt correspondence.
Ron Baalke
>On 26 Sep 2000 20:16 UT, Ron Baalke <baa...@kelvin.jpl.nasa.gov> wrote:
>
>>>Applets have a general problem of not being able to write files.
>>
>>Exactly. Which is why the libraries you mentioned won't work inside
>>applets.
>[...]
>>I ask again:
>>Are there any libraries that can be used inside of applets to save images?
>
>So where do you want the images to be saved, if not to a file?
>Back to the server that they came from?
Actually, I do want the images saved to a file, and on the server would
suffice. For security reasons, applets cannot directly write to files, but
I understand there are ways around it, such as sending the image data
to another program that resides on the same server, which then writes
it to disk. I was hoping that someone had already done this. Someone
mentioned signed applets would work as well, but requires installing
a plugin on the browser (yuck!).
Ron