Implement websocket that requires headers in java

I am making an application to collect a series of data from several websites. In one of them to do so I must communicate with the server through a WebSocket. This WebSocket has a series of parameters in the Header:

        Connection: Upgrade 
        Pragma: no-cache
        Cache-Control: no-cache
        User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36
        Upgrade: websocket
        Sec-WebSocket-Version: 13
        Accept-Encoding: gzip, deflate
        Accept-Language: es-ES,es;q=0.9,en;q=0.8,en-US;q=0.7 
        Sec-WebSocket-Key: k+ghkoMFCs/FZ3DkJtNKyg==
        Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits
        Sec-WebSocket-Protocol: zap-protocol-v1

I was looking for a way to implement the WebSocket in java SE and I found Jetty, after reviewing several examples in none of them I have seen that it is possible to define Header variables. There is some way to implement this task with Jetty or I should look for some other alternative

My code is the following, I tried to follow some examples that I found but the truth is that it is the first time I touch this topic and I am somewhat lost.

   public class Bet365ServerRequest {

    public static void main(String[] args) {

        String dest = "wss://premws-pt3.365lpodds.com/zap/?uid=5072739771513135";//
        WebSocketClient client = new WebSocketClient();


        try {

            Bet365ClientSocket socket = new Bet365ClientSocket();
            client.start();
            URI bet365Uri = new URI(dest);
            ClientUpgradeRequest request = new ClientUpgradeRequest();
            client.connect(socket, bet365Uri, request);
            socket.getLatch().await();
            socket.sendMessage("#?P?__time,S_280C2F9D9EF86C59847B787B7312C1FC000003");
            Thread.sleep(10000l);



        }catch(Throwable t) {
            t.printStackTrace();
        }finally {
            try {
                client.stop();
            }catch(Exception e) {
                e.printStackTrace();
            }
        }

    }

}



@WebSocket
public class Bet365ClientSocket{

private Session session;

    CountDownLatch latch= new CountDownLatch(1);

    @OnWebSocketMessage
    public void onText(Session session, String message) throws IOException {
        System.out.println("Message received from server:" + message);
    }

    @OnWebSocketConnect
    public void onConnect(Session session) {


         UpgradeRequest request = session.getUpgradeRequest();
         //request.setH
            Map<String, List<String>> params = request.getParameterMap();

            List<String> language = params.get("lang");
            if (language != null && language.size() > 0) {
                String lang = language.get(0);

        System.out.println("Connected to server");
        this.session=session;
        latch.countDown();
    }
    }

    public void sendMessage(String str) {
        try {
            session.getRemote().sendString(str);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public CountDownLatch getLatch() {
        return latch;
    }


}

The only message that appears on the console after executing the code is the following:

2018-11-20 19:09:55.419:INFO::main: Logging initialized @761ms to org.eclipse.jetty.util.log.StdErrLog