java - 如果通过了 IPV6 地址，如何捕获异常

Question

这是我下面的代码，如果传递了任何 IPV6 地址，我想捕获异常。知道如何在我的代码中完成它吗？

private static boolean validateAnIpAddress(String ipAddr) {  

     InetAddress address = null;
     boolean isIPv4;

        try {
            address = InetAddress.getByName(ipAddr);
            isIPv4 = address.getHostAddress().equals(ipAddr) && address instanceof Inet4Address;
        } catch (UnknownHostException e) {
            getLogger().log(LogLevel.ERROR, e.getMessage());
            //return false;
            isIPv4 = false;
        }

        return isIPv4;

     }

Answer 1

try
{
    address = InetAddress.getByName(ipAddr);

    boolean isIPv6 = address instanceof Inet6Address;
    if (isIPv6)
        throw new UnknownHostException("IPv6 Address");

    isIPv4 = address.getHostAddress().equals(ipAddr) && address instanceof Inet4Address;
}

通过检查是否address是一种Inet6Address类型，您可以在块内引发异常try，从而触发您的catch块。