leetcode/Problem468.java at master · actor168/leetcode · GitHub

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importjava.util.regex.Pattern;

classProblem468 {
publicstaticvoidmain(String[] args) {
StringIP = "1.2.2.3";
System.out.println(newProblem468().validIPAddress(IP));
	}

StringchunkIPv4 = "([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])";
PatternpattenIPv4 =
Pattern.compile("^(" + chunkIPv4 + "\\.){3}" + chunkIPv4 + "$");

StringchunkIPv6 = "([0-9a-fA-F]{1,4})";
PatternpattenIPv6 =
Pattern.compile("^(" + chunkIPv6 + "\\:){7}" + chunkIPv6 + "$");

publicStringvalidIPAddress(StringIP) {
if (pattenIPv4.matcher(IP).matches()) return"IPv4";
return (pattenIPv6.matcher(IP).matches()) ? "IPv6" : "Neither";
	}
}