// adds student to course
    public boolean addStudent(Student Student) {
               if (studentlist != null) {
                        if (numStudents == MAXPERCLASS || numStudents >= studentlist.length) { // if we are at the max number of students allowed
                                return false;
                        } else { // else we need more students
                                studentlist[numStudents] = Student; //adds student object to array of students
                                numStudents++;// increase the number of students in class by 1
                                return true;
                        }
                } else { // no students yet
                        studentlist[0] = Student;// adds first student
                        return true;
                }
        }