/**
     * Presenterar och hanterar kontomenyn
     */
    public void accountMenu()
    {
        String header = "\n### KONTO ###\n";
        String[] menuItems = {"1. Visa information om kontot",
                      "2. Insättning",
                      "3. Uttag",
                      "4. Avsluta kontot",
                      "0. Tillbaka till kundmenyn"};

        while(true)
        {
            int input = showMenu(header, menuItems);
            switch(input)
            {
                case 1: // Skriv ut data om kontot
                    /* Kontonummer, kontotyp, ränta, saldo (kreditgräns) */
                    savingAccountObject.listSavingAccountDetails(accountNumber);
                    creditAccountObject.listCreditAccountDetails(accountNumber);
                    transactionObject.listTransaction(accountNumber);
                    break;

                case 2: // Gör en insättning till kontot
                    System.out.println("Skriv in summan du vill sätta in på kontot: ");
                    amount = scanner.nextDouble();
                    savingAccountObject.makeSavingDeposit(amount, accountNumber);
                    creditAccountObject.makeCreditDeposit(amount, accountNumber);
                    transactionObject.transactionDeposit(amount, accountNumber);
                    System.out.println("\nSumman: " + amount + "kr har lagts till kontonummer: " + accountNumber);
                    break;

                case 3: // Gör ett uttag från kontot
                    System.out.println("Skriv in summan du vill ta ut från kontot: ");
                    amount = scanner.nextDouble();
                    if(savingAccountObject.checkSavingTransaction(amount, accountNumber))
                    {
                        transactionObject.transactionWithdrawel(amount, accountNumber);
                    }
                    if(savingAccountObject.checkSavingAccountNumber(accountNumber))
                    {
                        savingAccountObject.makeSavingWithdrawel(amount, accountNumber);
                    }

                    if(creditAccountObject.checkCreditTransaction(amount, accountNumber))
                    {
                        transactionObject.transactionWithdrawel(amount, accountNumber);
                    }
                    if(creditAccountObject.checkCreditAccountNumber(accountNumber))
                    {
                        creditAccountObject.makeCreditWithdrawel(amount, accountNumber);
                    }

                    break;

                case 4: // Avsluta kontot
                    savingAccountObject.deleteSpecifikSavingAccount(accountNumber);
                    creditAccountObject.deleteSpecifikCreditAccount(accountNumber);
                    /* ingen break här (vi VILL återgå till kundmenyn) */
                case 0:
                    System.out.println("Tillbaka till kundmenyn...");
                    return;
            }
        }
    }