-src
    -images
        -*.jpg
    -stock
        -*.java
-images (exact copy of -images)

-jar
    -images
        -*.jpg
    -stock
        -*.java
-images (folder is created but files don't get copied)

File imagesCopy = new File("images");
 File imagesOrg = new File(URLDecoder.decode(getClass().getResource("/images").getPath()));

 if (!imagesCopy.exists()) {
            imagesCopy.mkdir();
                for(final File child : imagesOrg.listFiles()) {
                    try{
                        Files.copy(child.toPath(), Paths.get(imagesCopy.getAbsolutePath()+"/"+child.getName()), REPLACE_EXISTING);
                    }catch(Exception e){
                        System.out.println(e);
                    }
                }
        }

File imagesOrg = new File(URLDecoder.decode(getClass().getResource("/images").getPath()));

D:Codebuildclassesimages

D:Codedistfile:D:Codedistegz.jar!images

D:Codedistegz.jar!images