Java Utililty Methods IP Address Get

String ret = null;
try {
    Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();
    while (nets.hasMoreElements()) {
        NetworkInterface net = nets.nextElement();
        if (net.isLoopback() || net.isVirtual() || net.getName().startsWith("vmnet")
                || net.getName().startsWith("docker")) {
            continue;
...

return chooseAddress().getHostAddress();

if (localIp != null) {
    return localIp;
Enumeration<?> e1 = (Enumeration<?>) NetworkInterface.getNetworkInterfaces();
while (e1.hasMoreElements()) {
    NetworkInterface ni = (NetworkInterface) e1.nextElement();
    if (!isUp(ni)) {
        continue;
...

String localip = "";
InetAddress inetaddress = InetAddress.getLocalHost();
localip = inetaddress.getHostAddress();
if ("127.0.0.1".equals(localip) || "localhost".equals(localip) || localip.indexOf("local") != -1) {
    Enumeration<NetworkInterface> allnetinterface = NetworkInterface.getNetworkInterfaces();
    while (allnetinterface.hasMoreElements()) {
        NetworkInterface net = allnetinterface.nextElement();
        Enumeration<InetAddress> ipenum = net.getInetAddresses();
...

try {
    InetAddress addr = InetAddress.getLocalHost();
    byte[] ip = addr.getAddress();
    if (ip == null || ip.length != 4) {
        return null;
    int[] ret = new int[4];
    for (int cnt = 0; cnt < 4; cnt++) {
...

return getLocalIP(EXCLUDE_IP);

try {
    Pattern pattern = Pattern.compile("(172|10)\\.[0-9]+\\.[0-9]+\\.[0-9]+");
    Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
    while (interfaces.hasMoreElements()) {
        NetworkInterface ni = interfaces.nextElement();
        Enumeration<InetAddress> en = ni.getInetAddresses();
        while (en.hasMoreElements()) {
            InetAddress addr = en.nextElement();
...

return getLocalIp("*>10>172>192>127");

Enumeration<NetworkInterface> netInterfaces = NetworkInterface.getNetworkInterfaces();
InetAddress ip = null;
InetAddress localip = null;
while (netInterfaces.hasMoreElements()) {
    NetworkInterface netIntf = netInterfaces.nextElement();
    Enumeration<InetAddress> address = netIntf.getInetAddresses();
    while (address.hasMoreElements()) {
        ip = address.nextElement();
...

String ip = InetAddress.getLocalHost().getHostAddress();
return ip;