public static void studentMainMenu() throws IOException, Exception {
        InputStreamReader in = new InputStreamReader(System.in);
        BufferedReader keyboard = new BufferedReader(in);
        int choice = 0;
        while (choice!=2) {
            System.out.println("~~~~~Student~~~~~");
            System.out.println("1. View Courses");;
            System.out.println("2. Quit");
            choice = Integer.parseInt(keyboard.readLine());
            
            if ( choice == 1 ) {
                new CommandLineInterface().showStudentGrades(
                        new CommandLineInterface().showStudentCourses());
            }            
        }
    }