class Login {
    private String client_id = "4382716";
    private String redirect_uri = "http://oauth.vk.com/blank.html";
    private String display = "popup";
    private String response_type = "token";
    private String access_token;
    Login(){
        HttpClient httpClient = new DefaultHttpClient()ж
        HttpPost post = new HttpPost("http://oauth.vk.com/authorize?" +
                "client_id="+client_id+
                "&redirect_uri="+redirect_uri+
                "&display="+display+
                "&response_type="+response_type);
        HttpResponse response = null;
 
        try {
            response = httpClient.execute(post);
            System.out.println("Success"); //Пишет, запрос выполнен
        } catch (ClientProtocolException e) {
            System.out.println(e);
        } catch (IOException e) {
            System.out.println(e);
        }
        post.abort();
        String HeaderLocation=response.getFirstHeader("location").getValue(); //а тут фейл, не может найти "location"
    }