Question

我尝试捕获最终有效的异常，但现在我需要弄清楚如何使其循环。那么，我怎样才能将用户输入（int select）转到循环外部？我可以尝试创建一个新功能，这可能会起到作用。

do {
    System.out.print("How many integers shall we compare? (Enter a positive integer): ");
    try {
        select = intFind.nextInt();
    } catch (InputMismatchException e) {
        // Display the following text in the event of an invalid input
        System.out.println("Invalid input!");
        intFind.nextLine();
    }
} while (select < 0);

然后

do
            {
                System.out.print("How many integers shall we compare? (Enter a positive integer): ");
                try {
                    b = Get();
                }
                catch (InputMismatchException e) {
                    // Display the following text in the event of an invalid input
                    System.out.println("Invalid input!");

                    intFind.nextLine();
                } copySel = b;  
            }while(select < 0);

和

static int Get()
    {
        Scanner intFind = new Scanner(System.in);
        int select;
        select = intFind.nextInt();
        return select;
    }

Answer 1

要使其循环，请确保将select初始化为小于0的值。但最好是条件select < 2，因为至少比较值更有意义

创建一个类似

的方法

private int[] promptIntegers(int numberOfIntegers, Scanner sc) {
    int[] integers = new int[numberOfIntegers];
    //read ints
    //return the array
}

并将其称为

select = intFind.nextInt();
int[] integers = promptIntegers(select, sc);
//do the comparison among the integers

如何使用异常catch来连续执行while循环？

1 个答案: