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

StringgetIPs()
get I Ps 
try {
    Enumeration<NetworkInterface> nets;
    NetworkInterface n;
    Enumeration<InetAddress> addrs;
    InetAddress a;
    String s = "";
    nets = NetworkInterface.getNetworkInterfaces();
    while (nets.hasMoreElements()) {
...
StringgetIPv4Address()
get I Pv Address 
try {
    Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
    NetworkInterface itf = null;
    while (en.hasMoreElements()) {
        itf = en.nextElement();
        if (!itf.isLoopback()) {
            Enumeration<InetAddress> addresses = itf.getInetAddresses();
            InetAddress addr = null;
...
StringgetIPV4Address(List addresses)
Finds an ipv4 address in a list of interface addresses 
for (InterfaceAddress interfaceAddress : addresses) {
    if (interfaceAddress.getAddress() instanceof Inet4Address) {
        return interfaceAddress.getAddress().getHostAddress();
return null;
Inet4AddressgetIPv4Address(NetworkInterface iface)
get I Pv Address 
for (InterfaceAddress interfaceAddress : iface.getInterfaceAddresses()) {
    if (interfaceAddress.getAddress() instanceof Inet4Address) {
        return (Inet4Address) interfaceAddress.getAddress();
return null;
Inet4AddressgetIPV4MainAddress(NetworkInterface ni)
Return the main ip V4 address associated with the ni 
Inet4Address[] addresses = getIPV4AllAddresses(ni);
if (addresses != null && addresses.length > 0) {
    return addresses[addresses.length - 1];
return null;
InetAddressgetIPv4MulticastGroup(int hash)
get I Pv Multicast Group 
return getIPv4MulticastGroup(hash, IPV4_MULTICAST_ALLOCATION_RANGE[0], IPV4_MULTICAST_ALLOCATION_RANGE[1]);
byte[]getIPV4NetwprkOrder(String theIp)
turn ip in string representation to byte array in network order. 
byte[] toReturn = new byte[IPV4_ADDRESS_LEN];
String[] fields = theIp.split("\\.");
if (fields == null || fields.length < IPV4_ADDRESS_LEN) {
    throw new UnknownHostException();
for (int i = 0; i < fields.length; i++) {
    toReturn[i] = (byte) Integer.parseInt(fields[i]);
return toReturn;
int[]getIPV6AddrArray(String s)
get IPV Addr Array 
try {
    InetAddress inetaddress = InetAddress.getByName(s);
    s = inetaddress.getHostAddress();
} catch (UnknownHostException unknownhostexception) {
    System.err.println("unknown ipv6 exception");
StringTokenizer stringtokenizer = new StringTokenizer(s, ":");
if (stringtokenizer.countTokens() != 8)
...
Inet6Address[]getIPV6AllAddresses(NetworkInterface ni)
Return all the ip V6 addresses associated with the ni 
ArrayList<Inet6Address> v = new ArrayList<Inet6Address>();
for (Enumeration<InetAddress> e = ni.getInetAddresses(); e.hasMoreElements();) {
    InetAddress addr = e.nextElement();
    if (addr instanceof Inet6Address)
        v.add((Inet6Address) addr);
return v.toArray(new Inet6Address[v.size()]);
ListgetIpv6List()
Get all IPv6 addresses defined in local network adapters. 
List<Inet6Address> addresses = new ArrayList<>();
try {
    for (Enumeration<NetworkInterface> nis = NetworkInterface.getNetworkInterfaces(); nis
            .hasMoreElements();) {
        NetworkInterface ni = nis.nextElement();
        for (Enumeration<InetAddress> ias2 = ni.getInetAddresses(); ias2.hasMoreElements();) {
            InetAddress ia = ias2.nextElement();
            if (ia instanceof Inet6Address) {
...