http://secondarykey.blogspot.jp/2012/03/dropboxrestful.html

gistfile1.java

        URL url = new URL("https://api.dropbox.com/1/oauth/request_token");
        HttpURLConnection connection = (HttpURLConnection)url.openConnection();
        connection.setDoInput(true);
        connection.addRequestProperty("Authorization", buildOAuthHeader(false));
        connection.setRequestMethod("GET");
 
        InputStream inStream = connection.getInputStream();
        BufferedReader input = new BufferedReader(new InputStreamReader(inStream));
        String line = input.readLine();