No. If you have jars with resources you need to use this resources in your app too.
Copy them to the right folder and make them readonly so they can not be deleted when compiling.
You need to add the info where to place new icons to users of your lib too.
I have something in mind but i´m not sure if it works or is true at all.
I remember darkly that there is a way to get resources out of an jar. Search forum about that
And a jar is just a zip-file. So it should be possible to extend th jar with some images.
As i said; not sure about this!
Edit: See
this.