asked on

Updating a Jar File

I am having a problem creating a jar file

1)I successfully archived my classes in by :-
jar uf myFile.jar *.class

2)I successfully updated my manifest to specify entry point by:-
jar cmf myManifestFile myFile.jar *.class

3) I want to archive an images directory into the jar that my application uses- here is my problem!
I try "jar uf myfile.jar images"
but I keep getting back
java.io.IOException: Error in writing existing jar file
at sun.tools.jar.Main.run(Main.java:177)
at sun.tools.jar.Main.main(Main.java:903)

What am I doing wrong?

Thanks

zzynx

See http://java.sun.com/docs/books/tutorial/jar/basics/update.html

I think you can't pass a directory.

does
jar uf myfile.jar images/MyImage.gif
work?

zzynx

replace "MyImage.gif" by one of yours of course

oliverUK

ASKER

I have already tried that, I get the same error.

Also you can archive directories :-

http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/jar.html

zzynx

Then it seems as your original jar file can't be found or overwritten

ashok3sep

Just add only the folder and see that all the images inside the folder are added.

ashok3sep

jar cv0f Images.jar Images ------> 0f means no compression for the Images

ashok3sep

jar uvf classes.jar *.class -C mydir/mysubdir/yimages

ashok3sep

After Adding your Images to your Jar file then in your Java program you must use

ImageIcon img = new ImageIcon(this.getClass().getResource("Images\YourImage.gif");

to see the Icon.

ASKER CERTIFIED SOLUTION

ashok3sep

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See answer

zzynx

oliverUK,
The link I gave in my first comment was a specific link of a whole Lesson: "Using JAR Files: The Basics."
ashok's comment is just a copy/paste out of another part of that lesson.
I would have expected a split.

ashok3sep

Thanks for accpeting

:-)

zzynx is right

zzynx

Thanks ashok.

If you want this question to be reopened, post a zero-point question in https://www.experts-exchange.com/Community_Support/

Subject: Moderator Please Reopen
Body: Please reopen this question:
https://www.experts-exchange.com/questions/21343414/Updating-a-Jar-File.html

Once reopened, you can perform a split.

oliverUK

ASKER

Yes splitting points is fair, apologies zzynx and thank you both for your input.

Regards

OliverUK

zzynx

>> Yes splitting points is fair
Thanks