Java try catch for do while loop not looping

Question

I was having some problem when trying to do a try catch for do while loop:

try{
    do {
        System.out.println("Enter your option: ");
        choice = sc.nextInt();
        switch (choice) {
            case 1:
                break;
            case 2:
                break;
            case 3:
                break;
            case 4:
                break;
            case 5:
                break;

        }
    } while (choice != 6);
    }catch(InputMismatchException e){
        System.out.println("Please enter option between 1-6.");
    }

What I am trying to do for the do while loop is when user entered anything other than 6 which is terminate, it will keep prompting for user input. For each case, it will go to certain method.

Then, I tried to do a try catch for InputMismatchException because my Scanner is taking integer from user input. However, after I entered alphabet instead of integer, the program just terminated itself. I am trying to do like when user entered alphabet, it will keep on prompting user for correct input.

Any ideas? Thanks in advance.

I was thinking if I should make another do while to wrap the entire try catch?

Answer 1

Do like :

try {
   choice = sc.nextInt();
} catch(InputMismatchException e){
        System.out.println("Please enter option between 1-6.");
        sc.next();
        continue;
    }

If user enters a invalid input it will go to the catch block and will continue the loop. Remove the outer try catch block. Its not required

Answer 2

To handle characters and and invalid numbers you could do something like this:

do {
    System.out.println("Enter your option: ");
    try{
      choice = sc.nextInt();
    catch(InputMismatchException e){
      choice = 0;
      sc.next();
    }
    switch (choice) {
        case 1:
            break;
        case 2:
            break;
        case 3:
            break;
        case 4:
            break;
        case 5:
            break;
        default:
            System.out.println("Please enter option between 1-6.");
            break;
       }
} while (choice != 6);