مشکل httpclient

[raha_jon]

سلام مشکل کد زیر چیه ؟؟؟
ارور میاره در USER_AGENT و HttpClientBuilder

String url = "http://www.google.com/search?q=httpClient";

         

        HttpClient client = HttpClientBuilder.create().build();

        HttpGet request = new HttpGet(url);

     

        // add request header

        request.addHeader("User-Agent", USER_AGENT);

        HttpResponse response = client.execute(request);

     

        System.out.println("Response Code : " 

                    + response.getStatusLine().getStatusCode());

     

        BufferedReader rd = new BufferedReader(

            new InputStreamReader(response.getEntity().getContent(  )));

     

        StringBuffer result = new StringBuffer();

        String line = "";

        while ((line = rd.readLine()) != null) {

            result.append(line);

        }

موارد را هم import کرده ام