Saya mencoba membuat switch case loop kembali jika mereka mendapatkan default

Question

    //Choice of choosing a dog or a cat

     String pet = input.next();

    switch (pet.charAt(0)) {
        case 'a' -> {
            System.out.println("What is your dog's name? ");
            String dogsName = input.next();
            System.out.println("Your Character's Name is: " + playerName + "\nYour Pet's Name is: " + dogsName);
        }
        case 'b' -> {
            System.out.println("What is your cat's name? ");
            String catsName = input.next();
            System.out.println("Character Name: " + playerName + "\nPet Name: " + catsName);
        }
        default -> System.out.println("That is not a valid option. Please choose again.");
    }

   input.close();

}

Saya tidak dapat menemukan loop untuk digunakan yang akan mengembalikannya ke kasus a dan berulang kali sampai pengguna menjawab menggunakan salah satu pilihan, Bantuan apa pun akan luar biasa! Terima kasih

Answer 1

Menggunakan do whileloop adalah cara sederhana untuk mengatasinya.

Saya menggunakan variabel repeatuntuk memeriksa, apakah saya perlu meminta masukan lagi atau tidak

Juga, perhatikan bahwa sekarang bahkan jika saya menambahkan kasus lain (katakanlah case 'c') saya tidak perlu mengubah kondisi untuk do whileloop saya

boolean repeat;
do {
    String pet = input.next();
    repeat = false;
    switch (pet.charAt(0)) {
        case 'a' -> {
            System.out.println("What is your dog's name? ");
            String dogsName = input.next();
            System.out.println("Your Character's Name is: " + playerName + "\nYour Pet's Name is: " + dogsName);
        }
        case 'b'-> {
            System.out.println("What is your cat's name? ");
            String catsName = input.next();
            System.out.println("Character Name: " + playerName + "\nPet Name: " + catsName);
        }
        default: System.out.println("That is not a valid option. Please choose again.");
        repeat = true;
    }
} while(repeat);
input.close();

Answer 2

Looping adalah solusi yang bagus tetapi Anda juga dapat menggunakan metode resesif di java.

public static void main(String[] args) {
    
        Scanner input = new Scanner(System.in);
    
    
        System.out.println("    Welcome To The Choices Game...    ");
        System.out.println("Please enter your name: " );
    
        String playerName = input.nextLine();
    
        System.out.println("What is " + playerName + "'s" + " favorite pet?");
        System.out.println("a. Dog \nb. Cat");
    
        //Choice of choosing a dog or a cat
    
        method();
   
    
      input.close();
    
 }

public void method()
{

         String pet = input.next();
    
        switch (pet.charAt(0)) {
            case 'a' -> {
                System.out.println("What is your dog's name? ");
                String dogsName = input.next();
                System.out.println("Your Character's Name is: " + playerName + "\nYour Pet's Name is: " + dogsName);
            }
            case 'b' -> {
                System.out.println("What is your cat's name? ");
                String catsName = input.next();
                System.out.println("Character Name: " + playerName + "\nPet Name: " + catsName);
            }
            default -> System.out.println("That is not a valid option. Please choose again.");
            method();
        }
       
}

Answer 3

Untuk mengulang seluruh bagian switch-case, Anda dapat mencoba meletakkannya di loop do-while. Adapun syarat untuk digunakan dengan blok do-while Anda bisa mencoba: -do {...}while(pet.charAt(0)!='a' || pet.charAt(0)!='b');

Saya memberi Anda solusi yang mungkin di bawah ini: -

   public static void main(String[] args) {

    Scanner input = new Scanner(System.in);


    System.out.println("    Welcome To The Choices Game...    ");
    System.out.println("Please enter your name: " );

    String playerName = input.nextLine();

    System.out.println("What is " + playerName + "'s" + " favorite pet?");
    System.out.println("a. Dog \nb. Cat");

    //Choice of choosing a dog or a cat

    do{
     String pet = input.next();

    switch (pet.charAt(0)) {
        case 'a' -> {
            System.out.println("What is your dog's name? ");
            String dogsName = input.next();
            System.out.println("Your Character's Name is: " + playerName + "\nYour Pet's Name is: " + dogsName);
            break;}
        case 'b' -> {
            System.out.println("What is your cat's name? ");
            String catsName = input.next();
            System.out.println("Character Name: " + playerName + "\nPet Name: " + catsName);
            break;}
        default -> System.out.println("That is not a valid option. Please choose again.");
    }
   
}while(pet.charAt(0)!='a' && pet.charAt(0)!='b');

  input.close();

}