public class PersonProgram { private Person hal, marit, jens, anne; private List<Person> personer; public void init() { hal = new Person1("Hallvard", "Trætteberg"); marit = new Person2("Marit Reitan"); jens = new Person2("Jens Trætteberg"); anne = new Person1("Anne", "Reitan"); personer = new ArrayList<Person>(Arrays.asList(hal, marit, jens, anne)); } private void writePerson(Person p, PrintWriter writer) { writer.println(p.getFullName()); } private Person readPerson(BufferedReader reader) throws IOException { String line = reader.readLine(); return new Person2(line); } public void run() { System.out.println("Ut: " + personer); try { PrintWriter writer = new PrintWriter("personer.txt"); for (Person person : personer) { writePerson(person, writer); } writer.close(); } catch (FileNotFoundException e) { } Collection<Person> innlestePersoner = new ArrayList<Person>(); try { BufferedReader reader = new BufferedReader(new FileReader("personer.txt")); while (reader.ready()) { innlestePersoner.add(readPerson(reader)); } reader.close(); } catch (FileNotFoundException e) { } catch (IOException e) { } System.out.println("Inn: " + innlestePersoner); } public static void main(String[] args) { PersonProgram program = new PersonProgram(); program.init(); program.run(); } }