TCP klient Karel 1.9 [PSI]

class Client {

    public static void cli_main(int port, String servername) throws IOException {
        Socket echoSocket = null;
        PrintWriter out = null;
        BufferedReader in = null;
        //init connection
        try {
            echoSocket = new Socket(servername, port);
            out = new PrintWriter(echoSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
        } catch (UnknownHostException e) {
            System.err.println("Unknown host: " + servername);
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for " + servername);
            System.exit(1);
        }
        int code = 0, nameStart = 0, nameEnd = 0, x = 0, y = 0, pX = 0, pY = 0;
        String osloveni = "Oslovuj mne ", request = "", response = "", name = "";
        while (echoSocket.isConnected() && !(code == 260 || code == 530 || code == 550 || code == 571 || code == 572)) {
            response = "";
            while (!response.endsWith("\r\n")) {
                response += (char) in.read();
            }
            //print response
            System.out.print("Receiving: " + response);
            code = Integer.parseInt(response.substring(0, 3));
            if (code == 210) {//initial communication
                nameStart = response.indexOf(osloveni) + osloveni.length();
                nameEnd = response.indexOf(".", nameStart);
                name = response.substring(nameStart, nameEnd);
                System.out.println("Parsed name: " + name);
                request = name + " VLEVO\r\n";
            }
            if (code == 580) { //processor damaged
                request = name + " OPRAVIT "
                        + response.substring(response.length() - 3, response.length() - 2) //proc number
                        + "\r\n";
            }
            if (code == 240) { //OK, bot is ready
                //AI goes here
                x = Integer.parseInt(response.substring(response.indexOf("(") + 1, response.indexOf(",")));
                y = Integer.parseInt(response.substring(response.indexOf(",") + 1, response.indexOf(")")));
                if (Math.abs(y) < Math.abs(pY) || Math.abs(x) < Math.abs(pX)) { //i am closer than last time
                    request = name + " KROK\r\n";
                } else {
                    request = name + " VLEVO\r\n"; //last time i went wrong
                }
                if (x == 0 && y == 1) {
                    request = name + " VLEVO\r\n";
                }
                if (x == 0 && y == 0) { //im done
                    request = name + " ZVEDNI\r\n";
                }
                if (x == pX && y == pY) { //no move last time
                    request = name + " KROK\r\n";
                }
            }
            if (code != 260) {
                pX = x;
                pY = y;
                out.print(request); //send request to server
                out.flush(); //flush after each message
                System.out.println("sending: " + request);
            }
        }
        //end transmision
        System.out.println("\nConnection closed by foreign host: " + echoSocket.getInetAddress() + "\n");
        out.close();
        in.close();
        echoSocket.close();
    }
}