public Item heaviestItem (){

        if (itemList.isEmpty()) {
            return null;
        }

        int auxWeight=0;
        String auxName="";
        Item auxItem= new Item(auxName, auxWeight);

        for (Item item : itemList) {
            if (item.getWeight()> auxItem.getWeight()) {
                auxItem=new Item(item.getName(), item.getWeight());
            }
        }
        return auxItem;
    }