private String getdayOfWeekString(int dayOfWeek) {
        switch(dayOfWeek) {
            case 1: return "Sonntag";
            case 2: return "Montag";
            case 3: return "Dienstag";
            case 4: return "Mittwoch";
            case 5: return "Donnerstag";
            case 6: return "Freitag";
            default: return "Samstag";
        }
    }