每次在扫描仪中键入人员姓名时，我总是出现 InputMismatchException 错误？

问：

我的代码有什么问题，为什么每次在控制台中键入名称时都出现 InputMismatchException 错误？

Scanner sc = new Scanner(System.in);
        System.out.println("How many People are there ? (employee and students included)");

        int  numPeople = sc.nextInt();
        Person[] personArray = new Person[numPeople];
        Student[] studentsArray = new Student[numPeople];
        Employee[] employeesArray = new Employee[numPeople];

        int i=0;

        while(i < numPeople) {
            System.out.println("Please enter the name and age of the person");
            String name = sc.nextLine();
            int age = sc.nextInt();sc.nextLine();
            Person person = new Person(name, age);
            personArray[i] = person;
            i++;