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The Java Developers Almanac 1.4Order this book from Amazon. |
e155. Sending to a Multicast GroupYou can send to a multicast socket using either aDatagramSocket
or a MulticastSocket. What makes it multicast is the address that
is in the datagram. If the address is a multicast address, the
datagram will reach the multicast members in the group. You only need
to use MulticastSocket if you want to control the time-to-live of
the datagram.
byte[] outbuf = new byte[1024]; int port = 1234; try { DatagramSocket socket = new DatagramSocket(); InetAddress groupAddr = InetAddress.getByName("228.1.2.3"); DatagramPacket packet = new DatagramPacket(outbuf, outbuf.length, groupAddr, port); socket.send(packet); } catch (SocketException e) { } catch (IOException e) { }
e154. Receiving from a Multicast Group
© 2002 Addison-Wesley. |