String sig = generateSignature(params,oauth_token_secret);
String authorization = generateAuthString(timestamp, nonce, sig);
HTTPRequest request;
request = new HTTPRequest(new URL(strURL + "?q=" + URLEncoder.encode(query_word,"UTF-8")),HTTPMethod.GET);
request.addHeader(new HTTPHeader("Authorization",authorization));
URLFetchService service = URLFetchServiceFactory.getURLFetchService();
HTTPResponse response = service.fetch(request);
return response;
}