public void commandMenu() {
        while (true) {
            System.out.println(STOR);
            System.out.println(RETR);
            System.out.println(LIST);
            System.out.println(DISCONNECT);
            System.out.print("Digite o comando : ");

            String choice;

            try {
                choice = bufferedReader.readLine();

                switch (choice) {
                    case STOR:
                        commandSTOR();
                        break;
                    case RETR:
                        commandRETR();
                        break;
                    case LIST:
                        commandLIST();
                        break;
                    case DISCONNECT:
                        commandDISCONNECT();
                        break;
                    case DELE:
                        commandDELETE();

                    default:
                        System.out.println("Comando não reconhecido!");

                }

            } catch (IOException iOException) {
                System.err.println("Opção inválida! Tente outra vez.");
            }

        }
    }