开发中容易引入的BUG

    public static String splitListByComma(List<String> dogs)
    {
        StringBuilder stringBuilder = new StringBuilder();
        for (String dogName : dogs)
        {
            stringBuilder.append(dogName).append(",");
        }
        return stringBuilder.substring(0, stringBuilder.length() - 1);
    }

public static String splitListByComma(List<String> dogs)
    {
        if (dogs.isEmpty())
        {
            return "";
        }
        StringBuilder stringBuilder = new StringBuilder();
        for (String dogName : dogs)
        {
            stringBuilder.append(dogName).append(",");
        }
        return stringBuilder.substring(0, stringBuilder.length() - 1);
    }