Ошибка

Добрый день! Почему то когда запускаую ввожу имя сервера всё работает, но когда ввожу имя порта выводит ошибку "Клиент не подключён к серверу!". Подскажите что можно сделать!

public class ClientGuiController extends Client{
    private ClientGuiModel model = new ClientGuiModel();
    private ClientGuiView view = new ClientGuiView(this);

    protected SocketThread getSocketThread(){
        return new GuiSocketThread();
    }

    public void run(){
        SocketThread socketThread = getSocketThread();
        socketThread.run();
    }


    protected String getServerAddress(){
        return view.getServerAddress();
    }

    protected int getServerPort(){
        return view.getServerPort();
    }

    protected String getUserName(){
        return view.getUserName();
    }

    public ClientGuiModel getModel(){
        return this.model;
    }

    public static void main(String[] args) {
        ClientGuiController clientGuiController = new ClientGuiController();
        clientGuiController.run();
    }



    public class GuiSocketThread extends SocketThread{
        @Override
        protected void processIncomingMessage(String message) {
            model.setNewMessage(message);
            view.refreshMessages();
        }

        @Override
        protected void informAboutAddingNewUser(String userName) {
            model.addUser(userName);
            view.refreshUsers();
        }

        @Override
        protected void informAboutDeletingNewUser(String userName) {
            model.deleteUser(userName);
            view.refreshUsers();
        }

        @Override
        protected void notifyConnectionStatusChanged(boolean clientConnected) {
            view.notifyConnectionStatusChanged(clientConnected);
            super.notifyConnectionStatusChanged(clientConnected);
        }
    }
}

public class Server {
    private static Map<String, Connection> connectionMap = new ConcurrentHashMap<>();
    public static void sendBroadcastMessage(Message message){
        for (Map.Entry<String, Connection> pair : connectionMap.entrySet()) {
            try {
                pair.getValue().send(message);
            } catch (IOException e) {
                ConsoleHelper.writeMessage("Message wasn't sent");
            }
        }
    }

    private static class Handler extends Thread{
        private Socket socket;

        Handler(Socket socket){
            this.socket = socket;
        }

        private String serverHandshake(Connection connection) throws IOException, ClassNotFoundException {

            while(true) {
                Message sent = new Message(MessageType.NAME_REQUEST, "Name please");
                connection.send(sent);
                Message received = connection.receive();
                if (received.getType() == MessageType.USER_NAME && !received.getData().isEmpty() && !connectionMap.containsKey(received.getData())) {
                    connectionMap.put(received.getData(), connection);
                    Message accepted = new Message(MessageType.NAME_ACCEPTED, "accepted");
                    connection.send(accepted);
                    return received.getData();
                }
            }
        }

        private void sendListOfUsers(Connection connection, String userName)throws IOException{
            for (String a : connectionMap.keySet()){
                if (!a.equals(userName)){
                    connection.send(new Message(MessageType.USER_ADDED, a));
                }

                }
        }

        private void serverMainLoop(Connection connection, String userName) throws IOException, ClassNotFoundException {
            while (true) {
                Message message = connection.receive();
                if (message != null && message.getType() == MessageType.TEXT) {
                    sendBroadcastMessage(new Message(MessageType.TEXT, userName + ": " + message.getData()));
                } else {
                    ConsoleHelper.writeMessage("Error!");
                }
            }
        }

        public void run(){
            ConsoleHelper.writeMessage(socket.getRemoteSocketAddress().toString());
            String name = null;
           try(Connection connection = new Connection(socket)){
               name = serverHandshake(connection);
               sendBroadcastMessage(new Message(MessageType.USER_ADDED, name));
               sendListOfUsers(connection, name);
               serverMainLoop(connection, name);
               connectionMap.remove(name);
               sendBroadcastMessage(new Message(MessageType.USER_REMOVED, name));
               ConsoleHelper.writeMessage("Connection is cosed!");
           } catch (IOException e ) {
               e.printStackTrace();
           } catch (ClassNotFoundException e) {
               e.printStackTrace();
           }

        }
    }
    public static void main(String[] args) {
        writeMessage("Enter the port.");
        try (ServerSocket serverSocket = new ServerSocket(ConsoleHelper.readInt())) {
            writeMessage("Server started!");
            while (true) {
                new Handler(serverSocket.accept()).start();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

вот код