Java Utililty Methods InetAddress Create

List of utility methods to do InetAddress Create

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Description

The list of methods to do InetAddress Create are organized into topic(s).

Method

StringgetHostAddress(InetAddress anAddress)
Normalized version of java.net.InetAddress#getHostAddress() that handles IPv6 addresss formatting using the style of IETF RFC 2732 and also handles removal of IPv6 scoping identifiers. 
String hostAddress;
if (anAddress instanceof Inet6Address) {
    hostAddress = anAddress.getHostAddress();
    int percentAt = hostAddress.indexOf('%');
    if (-1 == percentAt) {
        hostAddress = "[" + hostAddress + "]";
    } else {
        hostAddress = "[" + hostAddress.substring(0, percentAt) + "]";
...
StringgetHostAddress(InetAddress host)
get Host Address 
String hostAddr = host.getHostAddress();
if (host instanceof Inet6Address) {
    if (hostAddr.lastIndexOf('%') >= 0) {
        hostAddr = hostAddr.substring(0, hostAddr.lastIndexOf('%'));
return hostAddr;
StringgetHostName(InetAddress address)
This method tries to determine the hostname of the given InetAddress without triggering a reverse DNS lookup. 
String result;
String hostAddress = address.getHostAddress();
String inetAddr = address.toString();
int index1 = inetAddr.lastIndexOf('/');
int index2 = inetAddr.indexOf(hostAddress);
if (index2 == index1 + 1) {
    if (index1 == 0) {
        result = hostAddress;
...
StringgetHostName(InetAddress ia)
get Host Name 
return ia.getHostName();
StringgetHostNameReliably(final String requestingHost, final InetAddress site, final URL requestingUrl)
get Host Name Reliably 
String host = requestingHost;
if (host == null) {
    if (site != null) {
        host = site.getHostName();
    } else if (requestingUrl != null) {
        host = requestingUrl.getHost();
host = host == null ? "" : host;
return host;
StringgetHostNameWithoutDomain(final InetAddress addr)
get Host Name Without Domain 
final String hostName = addr.getHostName();
final int pos = hostName.indexOf('.');
if (pos == -1) {
    return hostName;
} else {
    return hostName.substring(0, pos);
InetAddressgetInetAddress()
get Inet Address 
try {
    return InetAddress.getLocalHost();
} catch (UnknownHostException e) {
    hostName = "unknown host!";
return null;
StringgetInetAddress()
get Inet Address 
try {
    InetAddress inet = InetAddress.getLocalHost();
    return inet.getHostAddress();
} catch (UnknownHostException e) {
    e.printStackTrace();
    return "";
InetAddressgetInetAddress()
get Inet Address 
InetAddress currentAddress = null;
try {
    InetAddress addrs[] = InetAddress.getAllByName(InetAddress.getLocalHost().getHostName());
    for (InetAddress addr : addrs) {
        if (!addr.isLoopbackAddress() && addr.isSiteLocalAddress()) {
            currentAddress = addr;
            break;
    if (currentAddress == null || currentAddress.getHostAddress() == null
            || currentAddress.getHostAddress().length() == 0) {
        try {
            Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces();
            for (NetworkInterface iface : Collections.list(ifaces)) {
                Enumeration<InetAddress> raddrs = iface.getInetAddresses();
                for (InetAddress raddr : Collections.list(raddrs)) {
                    if (!raddr.isLoopbackAddress() && raddr.isSiteLocalAddress()) {
                        currentAddress = raddr;
                        break;
        } catch (SocketException e) {
            e.printStackTrace();
} catch (UnknownHostException e) {
if (currentAddress != null && currentAddress.getHostAddress() != null
        && currentAddress.getHostAddress().length() > 0) {
    return currentAddress;
return null;
InetAddressgetInetAddress()
Return the local host address 
InetAddress address = null;
try {
    address = getFirstNonLoopbackAddress(false, false);
} catch (SocketException e) {
    e.printStackTrace();
if (address == null) {
    address = InetAddress.getLocalHost();
...