Java Utililty Methods IP Address Get

String ip = null;
Enumeration<NetworkInterface> enuNI = NetworkInterface.getNetworkInterfaces();
begin: while (enuNI.hasMoreElements()) {
    NetworkInterface ni = (NetworkInterface) enuNI.nextElement();
    Enumeration<InetAddress> enuAddress = ni.getInetAddresses();
    while (enuAddress.hasMoreElements()) {
        InetAddress address = enuAddress.nextElement();
        if (!address.isSiteLocalAddress() && !address.isLoopbackAddress()
...

String ip = getProperty("ip");
if (ip == null || ip.trim().length() == 0) {
    InputStream in = null;
    try {
        HttpURLConnection connection = (HttpURLConnection) new URL("https://cp.vu/show_my_ip")
                .openConnection();
        ip = new BufferedReader(new InputStreamReader(in = connection.getInputStream())).readLine();
    } catch (IOException e) {
...

String ip = "";
try {
    Enumeration<?> e1 = (Enumeration<?>) NetworkInterface.getNetworkInterfaces();
    while (e1.hasMoreElements()) {
        NetworkInterface ni = (NetworkInterface) e1.nextElement();
        Enumeration<?> e2 = ni.getInetAddresses();
        while (e2.hasMoreElements()) {
            InetAddress ia = (InetAddress) e2.nextElement();
...

InetAddress inet = InetAddress.getLocalHost();
return inet;