Java InputMismatchException

您可以使用do-while循环来消除first

input.nextInt()

do {    try {        System.out.print("Enter the number of students: ");        students = input.nextInt();    } catch (InputMismatchException e) {        System.out.print("Invalid number of students. ");    }    input.nextLine(); // clears the buffer} while (students <= 0);

因此，所有这些

InputMismatchException