Получение JSON с применением API

Добрый день, пишу, так как не могу понять в чем проблема.

Не могу в приложении получить JSONObject, потом начал писать код так же, как и в видеоуроке, но все равное не получается,

приложение просто сыпется.

API  передаю корректный.

public class MainActivity extends AppCompatActivity {

    private final String WEATHER_URL = "http://api.openweathermap.org/data/2.5/weather?q=Moscow&appid=ce12d17aeef642f58956750e47c69285&lang=ru&units=metric";

    private EditText editText;
    private Button button;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText = findViewById(R.id.editTextTextPersonName);
        button = findViewById(R.id.buttonShowWeather);
        textView = findViewById(R.id.textViewWeather);
    }

    public void onClickGetWeather(View view) {
        DownloadWeatherTask task = new DownloadWeatherTask();
        task.execute(WEATHER_URL);
    }

    private class DownloadWeatherTask extends AsyncTask<String, Void, String>{
        @Override
        protected String doInBackground(String... strings) {
            StringBuilder result = new StringBuilder();
            URL url = null;
            HttpURLConnection urlConnection = null;
            try {
                url = new URL(strings[0]);
                urlConnection = (HttpURLConnection) url.openConnection();
                InputStream inputStream = urlConnection.getInputStream();
                InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
                BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
                String line = bufferedReader.readLine();
                while(line != null){
                    result.append(line);
                    line = bufferedReader.readLine();
                }
                return result.toString();
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if(urlConnection != null){
                    urlConnection.disconnect();                }
            }
            return null;
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            try {
                JSONObject jsonObject = new JSONObject(s);
                String city = jsonObject.getJSONObject("coord").getString("lon");
                textView.setText(city);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
}

А вот и сама ошибка: 

 --------- beginning of crash
2021-03-26 08:52:31.598 4406-4406/com.example.myweatherapp E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.myweatherapp, PID: 4406
    java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
        at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:116)
        at org.json.JSONTokener.nextValue(JSONTokener.java:94)
        at org.json.JSONObject.<init>(JSONObject.java:159)
        at org.json.JSONObject.<init>(JSONObject.java:176)
        at com.example.myweatherapp.MainActivity$DownloadWeatherTask.onPostExecute(MainActivity.java:78)
        at com.example.myweatherapp.MainActivity$DownloadWeatherTask.onPostExecute(MainActivity.java:45)
        at android.os.AsyncTask.finish(AsyncTask.java:695)
        at android.os.AsyncTask.access$600(AsyncTask.java:180)
        at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:712)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:193)
        at android.app.ActivityThread.main(ActivityThread.java:6669)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2021-03-26 08:52:32.070 4406-4406/com.example.myweatherapp I/Process: Sending signal. PID: 4406 SIG: 9