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class UriBuilder {

  void build() throws MalformedURLException {
      Map<String, ? extends Serializable> params = Map.of("user_id", 123456789);
      URI uri = UriBuilder
        .fromUri("http://localhost:5040")
        .segment("users", "{user_id}", "books")
        .queryParam("author", "balzac")
        .buildFromMap(params);
      URL url = uri.toURL();
      //will display: http://localhost:5040/users/123456789/books?author=balzac
      System.out.println(url.toString());
  }
}