void
enumerateInterfaces() We must use -Djava.net.preferIPv4Stack=true to get expected results for broadcast address and prefix length.
final Enumeration<NetworkInterface> interfaces;
for (interfaces = NetworkInterface.getNetworkInterfaces(); interfaces.hasMoreElements();) {
final NetworkInterface networkInterface;
networkInterface = interfaces.nextElement();
if ((networkInterface.isUp()) && (!networkInterface.isVirtual())) {
reportInterface(networkInterface, "");
List
getAllAvailableInterfaces()
get All Available Interfaces
List<NetworkInterface> retval = new ArrayList<NetworkInterface>(10);
NetworkInterface intf;
for (Enumeration en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) {
intf = (NetworkInterface) en.nextElement();
retval.add(intf);
return retval;
List
getAllAvailableInterfaces()
Returns all the available interfaces, including first level sub interfaces.
List<NetworkInterface> allInterfaces = new ArrayList<>();
for (Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); interfaces
.hasMoreElements();) {
NetworkInterface intf = interfaces.nextElement();
allInterfaces.add(intf);
Enumeration<NetworkInterface> subInterfaces = intf.getSubInterfaces();
if (subInterfaces != null && subInterfaces.hasMoreElements()) {
while (subInterfaces.hasMoreElements()) {
...
List
getAllAvailableInterfaces()
get All Available Interfaces
List<NetworkInterface> allInterfaces = new ArrayList<>();
for (Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); interfaces
.hasMoreElements();) {
NetworkInterface networkInterface = interfaces.nextElement();
allInterfaces.add(networkInterface);
Enumeration<NetworkInterface> subInterfaces = networkInterface.getSubInterfaces();
if (subInterfaces.hasMoreElements()) {
while (subInterfaces.hasMoreElements()) {
...
Set
getAllInterfaces()
Get all the host interfaces including the loopback one
Set<NetworkInterface> result = new HashSet<NetworkInterface>();
try {
Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
while (e.hasMoreElements()) {
result.add(e.nextElement());
} catch (SocketException e) {
return result;
List
getAllInterfaces()
Get all interfaces, including virtual interfaces.
List<NetworkInterface> allInterfaces = Collections.list(NetworkInterface.getNetworkInterfaces()).stream()
.flatMap(m -> {
List<NetworkInterface> l = Collections.list(m.getSubInterfaces());
l.add(m);
return l.stream();
}).collect(Collectors.toList());
return allInterfaces;
Set
getAllLocalInterfaces()
Get all the interfaces which are not loopback ones
Set<NetworkInterface> result = new HashSet<NetworkInterface>();
try {
Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
while (e.hasMoreElements()) {
NetworkInterface ni = e.nextElement();
Enumeration<InetAddress> set = ni.getInetAddresses();
if (set.hasMoreElements()) {
InetAddress address = set.nextElement();
...
InetAddress[]
getAllLocalUsingNetworkInterface() Utility method that delegates to the methods of NetworkInterface to determine addresses for this machine.
try {
List<InetAddress> addresses = new ArrayList<InetAddress>();
Enumeration<NetworkInterface> e = NetworkInterface.getNetworkInterfaces();
while (e.hasMoreElements()) {
NetworkInterface ni = e.nextElement();
for (Enumeration<InetAddress> e2 = ni.getInetAddresses(); e2.hasMoreElements();) {
addresses.add(e2.nextElement());
return addresses.toArray(new InetAddress[] {});
} catch (SocketException ex) {
throw new UnknownHostException("127.0.0.1");
NetworkInterface
getAvailableNetworkInterface() get Available Network Interface
try {
Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
while (networkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaces.nextElement();
if (networkInterface.isLoopback())
continue;
if (networkInterface.isUp())
return networkInterface;
...
String
getBroadcast() get Broadcast
System.setProperty("java.net.preferIPv4Stack", "true");
for (Enumeration<NetworkInterface> niEnum = NetworkInterface.getNetworkInterfaces(); niEnum
.hasMoreElements();) {
NetworkInterface ni = niEnum.nextElement();
if (!ni.isLoopback()) {
for (InterfaceAddress interfaceAddress : ni.getInterfaceAddresses()) {
InetAddress bcast = interfaceAddress.getBroadcast();
if (bcast != null) {
...