Java: file path when running from as JAR

Question

I have a Java/JavaFX project where I use style sheets.

Images from stylesheets will get loaded as follows:

#pane {
-fx-background-image:url('../packagename/image.jpg');
 }

It loads fine when I compile and run it from Eclipse or Scenebuilder. However, when running my jar file from the cmd (java -jar project.jar), it adds the file name to the path, changing it to:

project.jar/packagename/image.jpg

and obviously failing to load it. How do I get the correct path, or alternatively, omit the jar from the somehow jar generated path? The jar file is in the package folder here outlined as packagename.

Is the image added to the jar file (check, if it's listed by jar tf project.jar)? Do the urls meet the requirements specified in the css reference ( docs.oracle.com/javase/8/javafx/api/javafx/scene/doc-files/… )? — fabian
– fabian, Commented Dec 19, 2016 at 22:04

ack · Accepted Answer · 2016-12-19 21:32:32Z

0

Add all of the images to a source folder. Since you said you're using Eclipse, just right click on your project -> New Source Folder. Name it something like res. Copy and paste all of your images in there.

answered Dec 19, 2016 at 21:32

ack

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5 Comments

sandboxj Over a year ago

How does this help? I still have to put in the path in the css file which then gets changed again by the jar file or?

ack Over a year ago

@sandboxj You would just put in "image.jpg", not the whole path.

sandboxj Over a year ago

I tried both suggestions. The problem remains when running the .jar file. I am using the Export -> Java - > JAR file option. And I selected Export generated class files and resources and Export Java source files and resources

sandboxj Over a year ago

Do I have to move the project.css file in the source folder too? Because if I move the pictures only it does not work at all, not even in eclipse.

ack Over a year ago

Yes. Move it in the res folder.

n247s · Accepted Answer · 2016-12-19 21:54:04Z

Assuming the "packageName" is a path from the root of the jar file, it will obviously fail. The ../ prefix on your path will cause your relative location will go up to its parent directory, and search the part after the ../ from that directory.

In eclipse the parent directory would propably be the project directory, while in your .jar file, it is the jar file itself giving the result you described. A fix would be to use source directories (configured in the "buildpath" in eclipse). The structure of these sourcepath's is up to you, though a common structure is as follows:

Root (either the eclipse project folder, or the .jar file
   | src
   |   | main
   |      | java // usually here goes all the code
   |      | resources  // and here goes all the resources the code needs.

Again the above is no requirement to make a java project perfect, though it is common practise.

Propably another fix would be to use no ../ at all, although Im not sure about that. It might be a .jar-file-only fix.

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