code: public static final void setIntAttribute(Path path, String attribute, int value, LinkOption... options) throws IOException
      {
          attribute = attribute.startsWith("user:") ? attribute : "user:"+attribute;
          Files.setAttribute(path, attribute, Primitives.writeInt(value), options);
      }
docs: Set user-defined-attribute
  @param path
  @param attribute user:attribute name. user: can be omitted.. user: can be omitted.
  @param value
  @param options
  @throws IOException