MulticastSocket getNetworkInterface() in Java

getNetworkInterface(): This method is available in the java.net.MulticastSocket class of Java.

Syntax:

NetworkInterface java.net.MulticastSocket.getNetworkInterface() throws SocketException

This method gets the multicast network interface set.

Parameters: NA

Returns: The multicast NetworkInterface is currently set. A placeholder NetworkInterface is returned when there is no interface set; it has a single InetAddress to represent any local address.

Throws:

1. SocketException - if there is an error in the underlying protocol, such as a TCP error.

Approach

Java

package com.MulticastSocket;

import java.io.IOException;
import java.net.MulticastSocket;

public class MulticastSocketgetNetworkInterface {
    public static void main(String[] args) throws IOException {

        MulticastSocket multicastSocket = new MulticastSocket();

        System.out.println(multicastSocket.getNetworkInterface());
    }
}

Output:

name:0.0.0.0

Some other methods of MulticastSocket class

MulticastSocket(): This method constructs a multicast socket and binds it to any available port on the local host machine. 

MulticastSocket(int): This method constructs a multicast socket and binds it to the specified port on the local host machine.

MulticastSocket(SocketAddress): This method creates a multicast socket, bound to the specified local socket address.

getNetworkInterface(): This method gets the multicast network interface set.

getTimeToLive(): This method gets the default time-to-live for multicast packets sent out on the socket.

joinGroup(SocketAddress, NetworkInterface): This method joins the specified multicast group at the specified interface.

leaveGroup(SocketAddress, NetworkInterface): This method leaves a multicast group on a specified local interface.

setNetworkInterface(NetworkInterface): This method specifies the network interface for outgoing multicast datagrams sent on this socket.

setTimeToLive(int): This method sets the default time-to-live for multicast packets sent out to this MulticastSocket in order to control the scope of the multicast.