sysout test

public Student findStudent(int studieNr) {
        Student student = null;
        boolean found = false;
        for (Integer i : students.keySet()) {
            System.out.println(found + " 1");
            if (i == studieNr) {
                System.out.println(found + " 2");
                found = true;
                student = students.get(i);
            }
        }
        if (found = true) {
            System.out.println(found + " 3");
            return student;
        } else {
            System.out.println(found + " 4");
            return null;
        }
    }