Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

This subclass of
DatagramSocket can send and receive multicast UDP
packets. It extends DatagramSocket by adding
joinGroup( )
and leaveGroup(
) methods to join and leave multicast
groups. You do not have to join a group
to send a packet to a multicast address, but you must join the group
to receive packets sent to that address. Note that the use of a
MulticastSocket is governed by a security manager.

Use setTimeToLive(
)
to set a time-to-live value
for any packets sent through a MulticastSocket.
This constrains the number of network hops a packet can take and
controls the scope of a multicast. Use setInterface(
)
or
setNetworkInterface( ) to specify the
InetAddress or the
NetworkInterface that outgoing multicast packets
should use: this is useful for servers or other computers that have
more than one internet address or network interface.
setLoopbackMode(
) specifies whether a multicast
packets sent through this socket should be send back to this socket
or not. This method should really be named
"setLoopbackModeDisabled( )":
passing an argument of TRue requests (but does not
require) that the system disable loopback
packets.

Figure 12-12. java.net.MulticastSocket

public class

MulticastSocket extends DatagramSocket {
// Public Constructors
public

MulticastSocket ( ) throws java.io.IOException;

1.4 public

MulticastSocket (SocketAddress

bindaddr ) throws java.io.IOException;
public

MulticastSocket (int

port ) throws java.io.IOException;
// Public Instance Methods
public InetAddress

getInterface ( )
throws SocketException; default:Inet4Address

1.4 public boolean

getLoopbackMode ( ) throws SocketException; default:false

1.4 public NetworkInterface

getNetworkInterface ( ) throws SocketException;

1.2 public int

getTimeToLive ( ) throws java.io.IOException; default:1
public void

joinGroup (InetAddress

mcastaddr ) throws java.io.IOException;

1.4 public void

joinGroup (SocketAddress

mcastaddr , NetworkInterface

netIf )
throws java.io.IOException;
public void

leaveGroup (InetAddress

mcastaddr )
throws java.io.IOException;

1.4 public void

leaveGroup (SocketAddress

mcastaddr , NetworkInterface

netIf ) throws java.io.IOException;
public void

setInterface (InetAddress

inf ) throws SocketException;

1.4 public void

setLoopbackMode (boolean

disable ) throws SocketException;

1.4 public void

setNetworkInterface (NetworkInterface

netIf )
throws SocketException;

1.2 public void

setTimeToLive (int

ttl ) throws java.io.IOException;
// Deprecated Public Methods

# public byte

getTTL ( ) throws java.io.IOException; default:1

# public void

send (DatagramPacket

p , byte

ttl ) throws java.io.IOException;

# public void

setTTL (byte

ttl ) throws java.io.IOException;
}