Get json data over network in Java

network.java

public JSONObject GET (String url) {
        JSONObject json;
        try {
            URL target = new URL(url);
            HttpURLConnection urlcon = (HttpURLConnection) target.openConnection();
            InputStream in = new BufferedInputStream(urlcon.getInputStream());
            BufferedReader streamReader = new BufferedReader(new InputStreamReader(in, "UTF-8"));
            StringBuilder responseStrBuilder = new StringBuilder();
            String inputStr;
            while ((inputStr = streamReader.readLine()) != null)
                responseStrBuilder.append(inputStr);
            json = new JSONObject(responseStrBuilder.toString());
        } catch (MalformedURLException e) {
            e.printStackTrace();
            return null;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        } catch (JSONException e) {
            e.printStackTrace();
            return null;
        }
        
        return json;
}