NetworkInterface.networkInterfaces() in Java

NetworkInterface.networkInterfaces(): This method is available in the java.net.NetworkInterface class of Java.

Syntax:

Stream<NetworkInterface> java.net.NetworkInterface.networkInterfaces() throws SocketException

This method returns a Stream of all the interfaces on this machine. The Stream contains at least one interface, possibly representing a loopback interface that only supports communication between entities on this machine.

Parameters: NA

Returns: a Stream of NetworkInterfaces found on this machine.

Throws:

1. SocketException - if an I/O error occurs, or if the platform does not have at least one configured network interface.

Approach

Java

package com.NetworkInterface;

import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.stream.Stream;

public class NetworkInterfacenetworkInterfaces {
    public static void main(String[] args) 
                          throws SocketException {

        Stream<NetworkInterface> networkInterface = NetworkInterface.networkInterfaces();

        networkInterface.forEach(n -> System.out.println(n));

    }
}

Output:

name:lo (Software Loopback Interface 1)
name:net0 (Microsoft 6to4 Adapter)
name:net1 (WAN Miniport (L2TP))
name:net2 (WAN Miniport (SSTP))
name:net3 (Microsoft IP-HTTPS Platform Adapter)
name:eth0 (WAN Miniport (Network Monitor))
name:net4 (WAN Miniport (IKEv2))
name:wlan0 (Microsoft Wi-Fi Direct Virtual Adapter)
name:ppp0 (WAN Miniport (PPPOE))
name:wlan1 (Microsoft Wi-Fi Direct Virtual Adapter #2)
name:eth1 (WAN Miniport (IPv6))
name:net5 (WAN Miniport (PPTP))
name:eth2 (Bluetooth Device (Personal Area Network))
name:eth3 (Intel(R) Ethernet Connection (3) I218-V)
name:net6 (Microsoft Teredo Tunneling Adapter)
name:wlan2 (Intel(R) Dual Band Wireless-AC 3160)
name:eth4 (Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64)
name:eth5 (Microsoft Kernel Debug Network Adapter)
name:eth6 (WAN Miniport (IP))
name:eth7 (Intel(R) Ethernet Connection (3) I218-V-WFP Native MAC Layer LightWeight Filter-0000)
name:eth8 (Intel(R) Ethernet Connection (3) I218-V-QoS Packet Scheduler-0000)
name:eth9 (Intel(R) Ethernet Connection (3) I218-V-WFP 802.3 MAC Layer LightWeight Filter-0000)
name:wlan3 (Intel(R) Dual Band Wireless-AC 3160-WFP Native MAC Layer LightWeight Filter-0000)
name:wlan4 (Intel(R) Dual Band Wireless-AC 3160-Virtual WiFi Filter Driver-0000)
name:wlan5 (Intel(R) Dual Band Wireless-AC 3160-Native WiFi Filter Driver-0000)
name:wlan6 (Intel(R) Dual Band Wireless-AC 3160-QoS Packet Scheduler-0000)
name:wlan7 (Intel(R) Dual Band Wireless-AC 3160-WFP 802.3 MAC Layer LightWeight Filter-0000)
name:wlan8 (Microsoft Wi-Fi Direct Virtual Adapter-WFP Native MAC Layer LightWeight Filter-0000)
name:wlan9 (Microsoft Wi-Fi Direct Virtual Adapter-Native WiFi Filter Driver-0000)
name:wlan10 (Microsoft Wi-Fi Direct Virtual Adapter-QoS Packet Scheduler-0000)
name:wlan11 (Microsoft Wi-Fi Direct Virtual Adapter-WFP 802.3 MAC Layer LightWeight Filter-0000)
name:eth10 (WAN Miniport (IP)-WFP Native MAC Layer LightWeight Filter-0000)
name:eth11 (WAN Miniport (IP)-QoS Packet Scheduler-0000)
name:eth12 (WAN Miniport (IPv6)-WFP Native MAC Layer LightWeight Filter-0000)
name:eth13 (WAN Miniport (IPv6)-QoS Packet Scheduler-0000)
name:eth14 (WAN Miniport (Network Monitor)-WFP Native MAC Layer LightWeight Filter-0000)
name:eth15 (WAN Miniport (Network Monitor)-QoS Packet Scheduler-0000)
name:wlan12 (Microsoft Wi-Fi Direct Virtual Adapter #2-WFP Native MAC Layer LightWeight Filter-0000)
name:wlan13 (Microsoft Wi-Fi Direct Virtual Adapter #2-Native WiFi Filter Driver-0000)
name:wlan14 (Microsoft Wi-Fi Direct Virtual Adapter #2-QoS Packet Scheduler-0000)
name:wlan15 (Microsoft Wi-Fi Direct Virtual Adapter #2-WFP 802.3 MAC Layer LightWeight Filter-0000)

Some other methods of NetworkInterface class

equals(Object): This method compares this object against the specified object.

NetworkInterface.getByIndex(int): This method gets a network interface given its index.

NetworkInterface.getByInetAddress(InetAddress): Convenience method to search for a network interface that has the specified Internet Protocol (IP) address bound to it.

NetworkInterface.getByName(String): This method searches for the network interface with the specified name.

getDisplayName(): This method gets the display name of this network interface.

getHardwareAddress(): This method returns the hardware address (usually MAC) of the interface if it has one and if it can be accessed given the current privileges.

getIndex(): This method returns the index of this network interface.

getInetAddresses(): This method gets an Enumeration with all or a subset of the InetAddresses bound to this network interface.

getInterfaceAddresses(): This method gets a List of all or a subset of the InterfaceAddressesof this network interface.

getMTU(): This method returns the Maximum Transmission Unit (MTU) of this interface.

getName(): This method gets the name of this network interface.

NetworkInterface.getNetworkInterfaces(): This method returns an Enumeration of all the interfaces on this machine.

getParent(): This method returns the parent NetworkInterface of this interface if this is a sub-interface, or null if it is a physical(non-virtual) interface or has no parent.

getSubInterfaces(): This method gets an Enumeration with all the subinterfaces (also known as virtual interfaces) attached to this network interface.

hashCode(): This method returns a hash code value for the object.

inetAddresses(): This method gets a Stream of all or a subset of the InetAddresses bound to this network interface.

isLoopback(): This method returns whether a network interface is a loopback interface.

isPointToPoint(): This method returns whether a network interface is a point-to-point interface.

isUp(): This method returns whether a network interface is up and running.

isVirtual(): This method returns whether this interface is a virtual interface.

NetworkInterface.networkInterfaces(): This method returns a Stream of all the interfaces on this machine.

subInterfaces(): This method gets a Stream of all subinterfaces attached to this network interface.

supportsMulticast(): This method returns whether a network interface supports multicasting or not.

toString(): This method returns a string representation of the object. In general, the toString method returns a string that"textually represents" this object.