public void moveInformations(int info1, int info2)
    {
        if (info1 < informations.size() && info2 < informations.size()) {
        	String temp = informations.get(info1);
            informations.set(info1, informations.get(info2));
            informations.set(info2, temp);
        }
        notifyZElement();
    }