if (isValidIpV4Address(ipAddressString)) { StringTokenizer tokenizer = new StringTokenizer(ipAddressString, "."); String token;
if (!NetUtil.isValidIpV4Address(host)) { throw new IllegalArgumentException(host + " is not a valid IPv4 address");
String ipAddressString) { if (isValidIpV4Address(ipAddressString)) { StringTokenizer tokenizer = new StringTokenizer(ipAddressString, ".");