The Java Developers Almanac 1.4


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Home > List of Packages > java.net  [27 examples] > Multicast  [3 examples]

e155. Sending to a Multicast Group

You can send to a multicast socket using either a DatagramSocket 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) {
    }

 Related Examples
e153. Joining a Multicast Group
e154. Receiving from a Multicast Group

See also: Datagram    Encodings    HTTP    Hostnames and IP Addresses    Sockets    URLs   


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