Different MAC Addresses Regex

Question

What is the correct regular expression for matching MAC addresses ? I googled about that but, most of questions and answers are incomplete. They only provide a regular expre

Answer 1

I know this question is kind of old but i think there is not a really good solution for the problem:

Two steps to do

1. Change the Mac String to parse to the format of your choice (e.g. xx:xx:xx:xx:xx:xx)
2. Write a method which validates a string with the format above

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Example:

1)

you can easily achieve this by calling

public static String parseMac(String mac) {
    mac = mac.replaceAll("[:.-]", "");

    String res = "";
    for (int i = 0; i < 6; i++) {
        if (i != 5) {
            res += mac.substring(i * 2, (i + 1) * 2) + ":";
        } else {
            res += mac.substring(i * 2);
        }
    }
    return res;
}

:.- are the chars which will be removed from the string

2)

public static boolean isMacValid(String mac) {
    Pattern p = Pattern.compile("^([a-fA-F0-9]{2}[:-]){5}[a-fA-F0-9]{2}$");
    Matcher m = p.matcher(mac);
    return m.find();
}

Ofc you can make the Pattern a local class variable to improve the efficiency of your code.