Find all the matches of xlink:href="<---I NEED THIS --->" from one SVG String

findEmbeddedImages.java

 public void findEmbeddedImages() {
        
       Pattern pattern = Pattern.compile("([^[-\\\\w.]+$\\/\\:\\.]*\\.(jpg|jpeg|png|gif))", Pattern.CASE_INSENSITIVE);
    // Pattern pattern = Pattern.compile("xlink:href=\"[^\"]*\"", Pattern.CASE_INSENSITIVE);
        Matcher matches = pattern.matcher(this.svg);

        while (matches.find()) {
            System.out.println("Match Found: " + matches.group());
            this.links.add(matches.group());
        }
    }

def find_embedded_image
    @svg.scan(/([a-z\-_0-9\/\:\.]*\.(jpg|jpeg|png|gif))/i) { |res|
      @links.add(res[0])
    }
   return @links.size
end

I am using the above code in my ruby application. This RegEx does work in the Ruby application. But I can not get it work in Java.