how to perform multiple POST request to the same API using diffrent Access token using JAVA

Question

So I've been trying for a while to make many calls to an API with POST request, where I need to parse the access token of my devices in the URL, which I've stored them in an array,

String [] arr = new String[49];
        arr[0] = "Access_Token1";
        arr[1] = "Access_Token2"; 

What I need to do in to iterate through the array and get every access token, put it in the url to make the request, this is the code I used to make one call to the API, but I had no idea how to do for many post request

              String paramValue = "param\\with\\backslash";
            String yourURLStr = "http://host.com?param=" + java.net.URLEncoder.encode(paramValue, "UTF-8");

            URL url2 = new URL("https://demo.thingsboard.io/api/v1/H2arM3bxFwobsGMAM5Rt/telemetry");
           for (int i=0; i<list.size(); i++) {
            HttpsURLConnection conn = (HttpsURLConnection) url2.openConnection();
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "application/json");
            conn.setRequestProperty("Accept", "application/json");
            conn.setRequestProperty("Authorization", "Bearer");

            conn.setDoOutput(true);
            OutputStream outStream = conn.getOutputStream();
            
            OutputStreamWriter outStreamWriter = new OutputStreamWriter(outStream, "UTF-8");
            
            outStreamWriter.write(list.get(1).toString());
            //outStreamWriter.write(list.toJSONString());
            outStreamWriter.flush();
            outStreamWriter.close();
            outStream.close();
            String response = null;

            System.out.println(conn.getResponseCode());
            System.out.println(conn.getResponseMessage());

            DataInputStream input1 = null;
            input1 = new DataInputStream (conn.getInputStream());
            while (null != ((response = input1.readLine()))) {
                System.out.println(response);
                input1.close ();
            }
        }}
        catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
    

can anyone give me a clue how to do so, It's been 3 weeks trying to do that and I'm still stuck in here.