Java Utililty Methods Network Interface Get

List of utility methods to do Network Interface Get

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Description

The list of methods to do Network Interface Get are organized into topic(s).

Method

intgetLinkLocalScopeId()
get Link Local Scope Id 
for (InetAddress a : getIPAddresses()) {
    if (a instanceof Inet6Address && a.isLinkLocalAddress()) {
        return ((Inet6Address) a).getScopeId();
throw new IOException("No IPv6 support on this device");
EnumerationgetLocalInterfaces()
Return the set of network interfaces for the local host. 
return NetworkInterface.getNetworkInterfaces();
StringgetLocalMac()
get Local Mac 
try {
    NetworkInterface network = NetworkInterface.getByInetAddress(InetAddress.getLocalHost());
    byte[] mac = network.getHardwareAddress();
    StringBuilder sb = new StringBuilder();
    for (int i = 0, ci = mac.length; i < ci; i++) {
        sb.append(String.format("%02X%s", mac[i], (i < ci - 1) ? "-" : ""));
    return sb.toString();
...
NetworkInterfacegetLocalNetworkInterface()
get Local Network Interface 
Enumeration<NetworkInterface> interfaces;
try {
    interfaces = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
    throw new RuntimeException("NetworkInterface not found", e);
while (interfaces.hasMoreElements()) {
    NetworkInterface networkInterface = interfaces.nextElement();
...
StringgetLoopbackInterface()
get Loopback Interface 
String networkInterface = "";
try {
    Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
    while (interfaces.hasMoreElements()) {
        NetworkInterface resolvedNetworkInterface = interfaces.nextElement();
        if (resolvedNetworkInterface.isLoopback()) {
            networkInterface = resolvedNetworkInterface.getDisplayName();
            break;
...
StringgetLoopbackInterfaceName()
Get the loopback interface name. 
try {
    for (NetworkInterface netIf : Collections.list(NetworkInterface.getNetworkInterfaces())) {
        if (netIf == null) {
            continue;
        if (netIf.isLoopback()) {
            return netIf.getName();
} catch (SocketException ex) {
return null;
NetworkInterfacegetLoopbackNIF()
Get a loopback NIF. 
Enumeration<NetworkInterface> nets;
try {
    nets = NetworkInterface.getNetworkInterfaces();
} catch (SocketException se) {
    return null;
while (nets.hasMoreElements()) {
    NetworkInterface net = nets.nextElement();
...
StringgetMac()
get Mac 
StringBuilder builder = new StringBuilder();
try {
    Enumeration<NetworkInterface> el = NetworkInterface.getNetworkInterfaces();
    while (el.hasMoreElements()) {
        byte[] mac = el.nextElement().getHardwareAddress();
        StringBuilder subBuilder = new StringBuilder();
        if (mac == null)
            continue;
...
byte[]getMacBytes()
get Mac Bytes 
try {
    InetAddress ia = InetAddress.getLocalHost();
    return NetworkInterface.getByInetAddress(ia).getHardwareAddress();
} catch (Exception e) {
    return null;
StringgetNetworkErrorMessage(Throwable e)
get Network Error Message 
if ("InvalidProtocolBufferException".equals(e.getClass().getSimpleName())) {
    return "Your Internet provider may require you to log in via your web browser.";
if (e instanceof UnknownHostException) {
    return "You may not be connected to the Internet.";
} else {
    return e.getClass().getSimpleName() + ": " + e.getMessage();