How I can save values to hash map from api?-CodePudding

 try {
        String apikey = "-------";
        String url = "https://freecurrencyapi.net/api/v2/latest?apikey="   apikey   "&base_currency=USD";
        URL urlForGetRequest = new URL(url);
        String readLine = null;
        HttpURLConnection conection = (HttpURLConnection) urlForGetRequest.openConnection();
        conection.setRequestMethod("GET");
        int responseCode = conection.getResponseCode();

        if (responseCode == HttpURLConnection.HTTP_OK) {
            BufferedReader in = new BufferedReader(new InputStreamReader(conection.getInputStream()));
            StringBuffer response = new StringBuffer();
            while ((readLine = in.readLine()) != null) {
                response.append(readLine);
            }
            in.close();
            System.out.println(response.toString());
        } else {
            throw new Exception("Error in API Call");
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }

How I can save values from api to Hashmap List? Where key will be first worth (e.g "JPY") and value will be worth of "JPY" (E.G 115). I wanted to use Jackson lib, but I didn't find any information for how to do it.

Or you can create that POJO manually.

After creating this class you should create gson from json string like below:

Gson gson = new Gson();

// JSON string to Java object
Currencies currencies = gson.fromJson(response.toString(), Currencies.class);

Finally you have a meaningful object instance which you can use/manipulate easily as you wish.