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	public ArrayList<Cd> finnAlleCder(String _artist){		ArrayList<Cd> cder = new ArrayList<Cd>();				for(int i=0 ; i<cdListe.size() ; i++){			Cd cdplaten = cdListe.get(i);			if (cdplaten.visArtistNavn().equalsIgnoreCase(_artist)) {				cder.add(cdplaten);				}		}		Collections.sort(cder);		return cder;	}-----------------------	public ArrayList finnAlleCder (String artist) {		ArrayList<String> cd2 = new ArrayList<String>();		for (int i = 0; i < cdListe.size(); i++) {			if (artist.equalsIgnoreCase(cdListe.get(i).visArtistNavn()))				cd2.add(cdListe.get(i).visTittel());		}		Collections.sort(cd2);		return cd2;	}