UML class diagram dependency or association

Question

I'm not really sure about how to distinguish whether I should define a relationship as dependency or association for certain cases.

For example,

class AttendanceSheet {
    Map<String> students;
    boolean[] attend;

    public void addStudent(Student s)
    {
        students.add(s.getName(),s.getStudentNumber());
    }

    public void checkAttendance(String name) { //... }
}

class Student {
    private String name;
    private int staffNumber;
    //more information such as address, age, etc..

    Student(String n, int sn)
    {
        name = n;
        studentNumber = sn;
    }

    public String getName()
    {
        return name.clone();
    }

    public String getStudentNumber()
    {
        return studentNumber;
    }
}

For this case, would Student and Association have association or dependency? This is because I'm not sure whether the association must have the actual reference of the object or it suffice to just have certain information that can reach the object (since student id and number is far more enough to know find out which student object it is directing to).

Answer 1

In your case the <<uses>> is sufficient, because you don't have actual properties of type Student in AttendanceSheet.

As a side note: not using object references and instead just having the studentNumber is - to say the least - an odd design. But I don't know the context.