Java Utililty Methods IP Address Get

List<InetAddress> addresses = new ArrayList<InetAddress>();
List<NetworkInterface> interfaces = Collections.list(NetworkInterface.getNetworkInterfaces());
for (NetworkInterface intf : interfaces) {
    List<InetAddress> addrs = Collections.list(intf.getInetAddresses());
    for (InetAddress a : addrs) {
        if (a.isLoopbackAddress()) {
            continue;
        addresses.add(a);
return addresses;

try {
    Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();
    while (nets.hasMoreElements()) {
        NetworkInterface nextElement = nets.nextElement();
        String name = nextElement.getName();
        if (name.startsWith("eth")) {
            Enumeration<InetAddress> inetAddresses = nextElement.getInetAddresses();
            while (inetAddresses.hasMoreElements()) {
...

URL myIP;
try {
    myIP = new URL("http://api.externalip.net/ip/");
    BufferedReader in = new BufferedReader(new InputStreamReader(myIP.openStream()));
    return in.readLine();
} catch (Exception e) {
    try {
        myIP = new URL("http://myip.dnsomatic.com/");
...

String address = "/unresolved";
try {
    address = InetAddress.getByAddress(bytes).toString();
} catch (Exception e) {
return address;

NetworkInterface iface = NetworkInterface.getByName(ifaceName);
if (iface == null) {
    throw new IllegalArgumentException("Network interface " + ifaceName + " not found");
InetAddress candidateAddress = null;
Enumeration<InetAddress> inetAddrs = iface.getInetAddresses();
while (inetAddrs.hasMoreElements()) {
    InetAddress inetAddr = inetAddrs.nextElement();
...

Vector<String> IPs = new Vector<String>();
try {
    NetworkInterface iface = null;
    for (Enumeration<?> ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements();) {
        iface = (NetworkInterface) ifaces.nextElement();
        InetAddress ia = null;
        for (Enumeration<?> ips = iface.getInetAddresses(); ips.hasMoreElements();) {
            ia = (InetAddress) ips.nextElement();
...

List<InetAddress> addrList = new ArrayList<InetAddress>();
for (Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces(); nics
        .hasMoreElements();) {
    NetworkInterface nic = nics.nextElement();
    if (nic.isUp()) {
        for (Enumeration<InetAddress> addresses = nic.getInetAddresses(); addresses.hasMoreElements();) {
            InetAddress address = addresses.nextElement();
            addrList.add(address);
...

try {
    return InetAddress.getByName(hostName).getHostAddress();
} catch (UnknownHostException e) {
    return hostName;

try {
    return InetAddress.getByName(hostName).getHostAddress();
} catch (UnknownHostException e) {
    return hostName;

try {
    String ip = hostIpCache.get(hostName);
    if (ip == "" || "".equals(hostName.trim())) {
        ip = InetAddress.getByName(hostName).getHostAddress();
        hostIpCache.putIfAbsent(hostName, ip);
    return ip;
} catch (UnknownHostException e) {
...