import java.util.*;
import java.io.*;
public class DataforbindelseFil extends Dataforbindelse {
	private List alle;

	private void gem() {
		try {
			ObjectOutputStream p = new ObjectOutputStream(
				new FileOutputStream("data.ser"));
			p.writeObject(alle);
			p.close();
		} catch (Exception e) { e.printStackTrace(); }
	}

	public DataforbindelseFil() {
		try {
			ObjectInputStream p = new ObjectInputStream(
				new FileInputStream("data.ser"));
			alle = (List) p.readObject();
			p.close();
		} catch (Exception e) {
			alle = new ArrayList();
		}
	}

	public void sletAlleData() {
		alle = new ArrayList();
		gem();
	}

	public void indsæt(Kunde k) {
		alle.add(k);
		gem();
	}

	public List hentAlle() { return alle; }
}