class Uke3 {
    public static void main(String[] args) {
        Person person1 = new Person("Roger", 40);
        Student student1 = new Student("Kaare", 212, 2004491);
        Person student1Person = student1;

        // System.out.println(person1.hentNavn());
        // System.out.println(student1.hentNavn());
        //
        Person student2 = new Student("Bengt", 34, 0131223);
        // System.out.println(student1.hentStudentID());
        System.out.println(( (Student)student1Person ).hentStudentID());

        Person[] personListe = {person1, student1, student2};
        System.out.println(((Student)personListe[1]).hentStudentID());

        Object[] objekter = new Object[10];

        int indeks = 0;

        for (int i = 0; i < personListe.length; i++) {
            if (personListe[i].hentNavn().equals("Kaare")) {
                indeks = i;
            }
        }

        System.out.println(indeks);

        System.out.println(person1 instanceof Student);
        System.out.println(student1 instanceof Person);
    }
}