HTTPUrlConnection using ip instead of address to avoiding DNS lookup

I want to get a page using it's IP instead host(www.example.com) to avoiding DNS lookup , but how do I achieve that? Right now I am using

URL myURL;
            try {
                myURL = new URL(url.getUrl() + "/robots.txt");
                HttpURLConnection myURLConnection = (HttpURLConnection) myURL.openConnection();
                myURLConnection.setRequestMethod("GET");
                myURLConnection.setUseCaches(false);

                BufferedReader in = new BufferedReader(new InputStreamReader(myURLConnection.getInputStream()));
                String inputLine;
                StringBuffer response = new StringBuffer();

                while ((inputLine = in.readLine()) != null) {
                    response.append(inputLine);
                }
                in.close();

                System.out.println(response.toString());

                File folder = new File("src/workspace/" + url.getHost());
                folder.mkdirs();
                folder.createNewFile();
                RunCrawler.writeFile("src/workspace/" + url.getHost() + "/robots.txt", response.toString());

            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (ProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

I want to use for example 172.217.18.164 instead www.google.com Can anyone please help me? Thanks