public void menuTextSym() {
        int choice;

        do {
            System.out.println("\n");
            System.out.println("Text Cryption Menu");
            System.out.println("Select Symmetric Cryption Methode");
            System.out.println("---------------------------------\n");
            System.out.println("1 - AES");
            System.out.println("2 - Back");
            System.out.print("Enter Number: ");
            while (!scanner.hasNextInt()) {
                System.out.print("That's not a number! Enter 1 or 2: ");
                scanner.next();
            }
            choice = scanner.nextInt();
        } while (choice < 1 || choice > 2);

        switch (choice) {
            case 1:
                AesUI.aesCrypterText(this);
                break;
            case 2:
                this.menuTextCrypt();
                break;
            default:
                this.menuTextSym();
        }
    }