Please Help: Java Applet 411 Length Required

[psdev]

I am new to Java. I wrote an applet that sends results (int w and int p) to a server, and I get the "411 Length Required" error. What am I doing wrong? How do I set a Content-Length?

This is the method that communicates with the server:

public void sendPoints1(int w, int p){

        try {
            String url = "http://somename.com:309/api/Results";
            String charset = "UTF-8";
            String query = String.format("?key=%s&value=%s",
                URLEncoder.encode(String.valueOf(w), charset),
                URLEncoder.encode(String.valueOf(p), charset));
            String length = String.valueOf((url + query).getBytes("UTF-8").length);
            
            HttpURLConnection connection = (HttpURLConnection) new URL(url + query).openConnection();
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Content-Length", length);
            connection.connect();
            System.out.println("Responce Code:    " + connection.getResponseCode());
            System.out.println("Responce Message: " + connection.getResponseMessage());
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }
       
    }

[Fubarable]

How is this different from your previous same question? Locking this as duplicate. Please re-read the forum rules regarding duplicate posts.