public void readFromBinaryFile(String fName) {
        // Indlæs listen fra filen "Befolkning.obj"

        File file = new File(fName);

        try {
            try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(file))) {
                this.list = (List<DanishTown>)ois.readObject();
            }
        } catch (IOException ex) {
            System.out.println(ex.getMessage());
        } catch (ClassNotFoundException ex) {
            System.out.println(ex.getMessage());
        }
    }