| Package | Description | 
|---|---|
| java.net | Provides the classes for implementing networking applications. | 
| java.nio.channels | Defines channels, which represent connections to entities that are capable of
 performing I/O operations, such as files and sockets; defines selectors, for
 multiplexed, non-blocking I/O operations. | 
| Modifier and Type | Field and Description | 
|---|---|
| static SocketOption<NetworkInterface> | StandardSocketOptions. IP_MULTICAST_IFThe network interface for Internet Protocol (IP) multicast datagrams. | 
| Modifier and Type | Method and Description | 
|---|---|
| static NetworkInterface | NetworkInterface. getByIndex(int index)Get a network interface given its index. | 
| static NetworkInterface | NetworkInterface. getByInetAddress(InetAddress addr)Convenience method to search for a network interface that
 has the specified Internet Protocol (IP) address bound to
 it. | 
| static NetworkInterface | NetworkInterface. getByName(String name)Searches for the network interface with the specified name. | 
| NetworkInterface | MulticastSocket. getNetworkInterface()Get the multicast network interface set. | 
| NetworkInterface | NetworkInterface. getParent()Returns the parent NetworkInterface of this interface if this is
 a subinterface, or  nullif it is a physical
 (non virtual) interface or has no parent. | 
| NetworkInterface | Inet6Address. getScopedInterface()Returns the scoped interface, if this instance was created with
 with a scoped interface. | 
| Modifier and Type | Method and Description | 
|---|---|
| static Enumeration<NetworkInterface> | NetworkInterface. getNetworkInterfaces()Returns all the interfaces on this machine. | 
| Enumeration<NetworkInterface> | NetworkInterface. getSubInterfaces()Get an Enumeration with all the subinterfaces (also known as virtual
 interfaces) attached to this network interface. | 
| Modifier and Type | Method and Description | 
|---|---|
| static Inet6Address | Inet6Address. getByAddress(String host,
            byte[] addr,
            NetworkInterface nif)Create an Inet6Address in the exact manner of  InetAddress.getByAddress(String,byte[])except that the IPv6 scope_id is
 set to the value corresponding to the given interface for the address
 type specified inaddr. | 
| boolean | InetAddress. isReachable(NetworkInterface netif,
           int ttl,
           int timeout)Test whether that address is reachable. | 
| void | MulticastSocket. joinGroup(SocketAddress mcastaddr,
         NetworkInterface netIf)Joins the specified multicast group at the specified interface. | 
| protected abstract void | DatagramSocketImpl. joinGroup(SocketAddress mcastaddr,
         NetworkInterface netIf)Join the multicast group. | 
| void | MulticastSocket. leaveGroup(SocketAddress mcastaddr,
          NetworkInterface netIf)Leave a multicast group on a specified local interface. | 
| protected abstract void | DatagramSocketImpl. leaveGroup(SocketAddress mcastaddr,
          NetworkInterface netIf)Leave the multicast group. | 
| void | MulticastSocket. setNetworkInterface(NetworkInterface netIf)Specify the network interface for outgoing multicast datagrams
 sent on this socket. | 
| Modifier and Type | Method and Description | 
|---|---|
| abstract NetworkInterface | MembershipKey. networkInterface()Returns the network interface for which this membership key was created. | 
| Modifier and Type | Method and Description | 
|---|---|
| MembershipKey | MulticastChannel. join(InetAddress group,
    NetworkInterface interf)Joins a multicast group to begin receiving all datagrams sent to the group,
 returning a membership key. | 
| MembershipKey | MulticastChannel. join(InetAddress group,
    NetworkInterface interf,
    InetAddress source)Joins a multicast group to begin receiving datagrams sent to the group
 from a given source address. | 
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