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Solution for JAVA with explanation:
Scanner scan = new Scanner(System.in); int n =scan.nextInt(); scan.nextLine();
String input = ""; Pattern ipv4 = Pattern.compile("(([0]?[0-9]?[0-9]|[1][0-9][0-9]|[2][0-5][0-5])(\\.)){3}([0]?[0-9]?[0-9]|[1][0-9][0-9]|[2][0-5][0-5])"); Pattern ipv6 = Pattern.compile("([a-f\\d]{1,4}(:){1}){7}[a-f\\d]{1,4}"); Matcher m; for(int i=0;i<n;i++){ input = scan.nextLine(); m = ipv4.matcher(input); if(m.matches()){ System.out.println("IPv4"); } else { m = ipv6.matcher(input); if(m.matches()){ System.out.println("IPv6"); } else { System.out.println("Neither"); } } input = ""; } scan.close();
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IP Address Validation
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Solution for JAVA with explanation:
Scanner scan = new Scanner(System.in); int n =scan.nextInt(); scan.nextLine();