Dynamic object creation from user input

I have a two classes, Student containing some basic info, and Course, containing some basic info and an ArrayList of Student objects. I want to dynamically (from user input) populate new instances of both classes. For example, user is prompted for course name, teacher and asked if they want to add students to the course. When done with the course and all the students' information, the loop goes back to asking to add another course.
What I do is, create a Course object and then add students. I manage Student objects by just creating them after collecting user unput with courseInstance.addStudent(new Student(name, age, phone)). It all works well for one course, but how do I manage multiple Course object, dynamically created from input?
Here is a code example:

    public static void main(String[] args) {
    // TODO code application logic here
    Course course = new Course();
    Scanner in = new Scanner(System.in);
    String ans;
    String name;
    String gender;
    String phone;
    int age;

    System.out.print("Enter course name: ");
    ans = in.nextLine();
    course.setName(ans);

    System.out.print("Enter teacher name: ");
    ans = in.nextLine();
    course.setTeacher(ans);

    while (true) {
        System.out.print("Add student (yes or exit): ");
        ans = in.nextLine();

        if (ans.equals("exit")) {
            break;
        }

        System.out.print("Enter name: ");
        name = in.nextLine();
        System.out.print("Enter age: ");
        age = in.nextInt();
        in.nextLine();
        System.out.print("Enter gender: ");
        gender = in.nextLine();
        System.out.print("Enter phone number: ");
        phone = in.nextLine();

        course.addStudent(new Student(age, name, phone, gender));
    }

    in.close();
    System.out.print(course);
}