GET Client MAC and UUID in JAVA

gistfile1.txt

  public static String getMacAddress() throws Exception {
        String macAddress = null;
        String command = "ifconfig";

        String osName = System.getProperty("os.name");
        System.out.println("Operating System is " + osName);

        if (osName.startsWith("Windows")) {
            command = "ipconfig /all";
        } else if (osName.startsWith("Linux") || osName.startsWith("Mac") || osName.startsWith("HP-UX")
                || osName.startsWith("NeXTStep") || osName.startsWith("Solaris") || osName.startsWith("SunOS")
                || osName.startsWith("FreeBSD") || osName.startsWith("NetBSD")) {
            command = "ifconfig -a";
        } else if (osName.startsWith("OpenBSD")) {
            command = "netstat -in";
        } else if (osName.startsWith("IRIX") || osName.startsWith("AIX") || osName.startsWith("Tru64")) {
            command = "netstat -ia";
        } else if (osName.startsWith("Caldera") || osName.startsWith("UnixWare") || osName.startsWith("OpenUNIX")) {
            command = "ndstat";
        } else {// Note: Unsupported system.
            throw new Exception("The current operating system '" + osName + "' is not supported.");
        }

        Process pid = Runtime.getRuntime().exec(command);
        BufferedReader in = new BufferedReader(new InputStreamReader(pid.getInputStream()));
        Pattern p = Pattern.compile("([\\w]{1,2}(-|:)){5}[\\w]{1,2}");
        while (true) {
            String line = in.readLine();
            System.out.println("line " + line);
            if (line == null)
                break;

            Matcher m = p.matcher(line);
            if (m.find()) {
                macAddress = m.group();
                break;
            }
        }
        in.close();
        return macAddress;
    }