Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.NetworkInterface;
import java.net.StandardProtocolFamily;
import java.net.StandardSocketOptions;
import java.nio.ByteBuffer;
import java.nio.channels.DatagramChannel;
import java.nio.channels.MembershipKey;

public class Main {
    public static final String MULTICAST_IP = "239.1.1.1";
    public static final int MULTICAST_PORT = 8989;

    public static final String MULTICAST_INTERFACE_NAME = "eth1";

    public static void main(String[] args) throws Exception {
        MembershipKey key = null;
        DatagramChannel client = DatagramChannel.open(StandardProtocolFamily.INET);

        NetworkInterface interf = NetworkInterface.getByName(MULTICAST_INTERFACE_NAME);
        client.setOption(StandardSocketOptions.SO_REUSEADDR, true);
        client.bind(new InetSocketAddress(MULTICAST_PORT));
        client.setOption(StandardSocketOptions.IP_MULTICAST_IF, interf);

        InetAddress group = InetAddress.getByName(MULTICAST_IP);
        key = client.join(group, interf);

        System.out.println("Joined the   multicast  group:" + key);
        System.out.println("Waiting for a  message  from  the" + "  multicast group....");

        ByteBuffer buffer = ByteBuffer.allocate(1048);
        client.receive(buffer);
        buffer.flip();
        int limits = buffer.limit();
        byte bytes[] = new byte[limits];
        buffer.get(bytes, 0, limits);
        String msg = new String(bytes);

        System.out.format("Multicast Message:%s%n", msg);
        key.drop();
    }
}