Java Utililty Methods IP Address Get

List of utility methods to do IP Address Get

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Description

The list of methods to do IP Address Get are organized into topic(s).

Method

StringgetExternalIPAddress()
get External IP Address 
BufferedReader in = null;
try {
    URL whatismyip = new URL("http://automation.whatismyip.com/n09230945.asp");
    in = new BufferedReader(new InputStreamReader(whatismyip.openStream()));
    return in.readLine(); 
} catch (IOException ex) {
} finally {
    try {
...
StringgetFirstLocalNonLoopbackIpAddress()
get First Local Non Loopback Ip Address 
SortedSet<String> addresses = new TreeSet<String>();
Iterator<NetworkInterface> iterator = localInterfaces.iterator();
while (iterator.hasNext()) {
    NetworkInterface networkInterface = iterator.next();
    Enumeration<InetAddress> inetAddressEnumeration = networkInterface.getInetAddresses();
    while (inetAddressEnumeration.hasMoreElements()) {
        InetAddress address = inetAddressEnumeration.nextElement();
        if (!address.isLoopbackAddress() && !address.getHostAddress().contains(":")) {
...
InetAddressgetFirstNonLoopbackAddress(boolean preferIpv4, boolean preferIPv6)
Get the first non-loopback address. 
Enumeration en = NetworkInterface.getNetworkInterfaces();
while (en.hasMoreElements()) {
    NetworkInterface i = (NetworkInterface) en.nextElement();
    for (Enumeration en2 = i.getInetAddresses(); en2.hasMoreElements();) {
        InetAddress addr = (InetAddress) en2.nextElement();
        if (!addr.isLoopbackAddress()) {
            if (addr instanceof Inet4Address) {
                if (preferIPv6) {
...
StringgetFirstNonLoopBackAddress(boolean preferIpv4, boolean preferIPv6)
get First Non Loop Back Address 
final Enumeration en = NetworkInterface.getNetworkInterfaces();
while (en.hasMoreElements()) {
    final NetworkInterface i = (NetworkInterface) en.nextElement();
    for (Enumeration en2 = i.getInetAddresses(); en2.hasMoreElements();) {
        final InetAddress address = (InetAddress) en2.nextElement();
        if (!address.isLoopbackAddress()) {
            if (address instanceof Inet4Address) {
                if (preferIPv6) {
...
StringgetHostIp()
get Host Ip 
if (null == getInetAddress()) {
    return null;
String ip = getInetAddress().getHostAddress(); 
return ip;
HashSetgetHostIP()
get Host IP 
HashSet ipAdd = new HashSet();
try {
    for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
            .hasMoreElements();) {
        NetworkInterface intf = en.nextElement();
        for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
            InetAddress inetAddress = enumIpAddr.nextElement();
            if (!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress()
...
StringgetHostIp()
get Host Ip 
if (_hostIp == null) {
    try {
        if (System.getProperty("host.ip.forced") != null
                && !System.getProperty("host.ip.forced").equals("")) {
            _hostIp = System.getProperty("host.ip.forced");
        } else {
                if (publicIPUnavilable()) {
...
StringgetHostIP()
Find the IP address of localhost. 
try {
    byte[] ipAddr = InetAddress.getLocalHost().getAddress();
    StringBuilder b = new StringBuilder();
    if (ipAddr != null && ipAddr.length > 0) {
        b.append(ipAddr[0]);
        for (int i = 1; i < ipAddr.length; i++) {
            b.append('.').append(ipAddr[i]);
        return b.toString();
} catch (UnknownHostException e) {
return null;
StringgetHostIP()
Method to return the IP address of the host computer 
try {
    InetAddress thisIp = InetAddress.getLocalHost();
    return thisIp.getHostAddress();
} catch (Exception e) {
    e.printStackTrace();
    return "No IP Found";
StringgetHostIpAddress()
Returns the IP address hosting this JVM, or null if it could not be determined. 
try {
    InetAddress host = InetAddress.getLocalHost();
    return host.getHostAddress();
} catch (Exception ex) {
return null;