public String getItemString()
    {
        String returnString = "You have";
        Set<String> keys = items.keySet();
        for(String item : keys) 
        {
            if(getItem(item).getQuantity()>0)
            {
                returnString += ", "+getItem(item).getQuantity()+" "+ item;
            }
        }
        returnString += " in your inventory.";
        return returnString;
    }