Multicast Sender
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.net.SocketException;
import java.net.UnknownHostException;
public class MulticastSender {
public static void main(String[] args) {
InetAddress ia = null;
int port = 0;
String characters = "Here's some multicast data\n";
byte[] data = new byte[characters.length()];
// read the address from the command line
try {
try {
ia = InetAddress.getByName(args[0]);
} catch (UnknownHostException e) {
//ia = InetAddressFactory.newInetAddress(args[0]);
}
port = Integer.parseInt(args[1]);
} catch (Exception e) {
System.err.println(e);
System.err.println("Usage: java MulticastSender MulticastAddress port");
System.exit(1);
}
characters.getBytes(0, characters.length(), data, 0);
DatagramPacket dp = new DatagramPacket(data, data.length, ia, port);
try {
MulticastSocket ms = new MulticastSocket();
ms.joinGroup(ia);
for (int i = 1; i < 10; i++) {
ms.send(dp, (byte) 1);
}
ms.leaveGroup(ia);
ms.close();
} catch (SocketException se) {
System.err.println(se);
} catch (IOException ie) {
System.err.println(ie);
}
}
}
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