private static boolean func_71608_a(String par0Str)
    {
        if (par0Str.length() < 3 || par0Str.charAt(1) != '.')
        {
            return false;
        }

        char c = par0Str.charAt(0);

        if (c < '0' || c > '2')
        {
            return false;
        }

        boolean flag = false;

        for (int i = par0Str.length() - 1; i >= 2; i--)
        {
            char c1 = par0Str.charAt(i);

            if ('0' <= c1 && c1 <= '9')
            {
                flag = true;
                continue;
            }

            if (c1 == '.')
            {
                if (!flag)
                {
                    return false;
                }

                flag = false;
            }
            else
            {
                return false;
            }
        }

        return flag;
    }