Java UDP BroadCating.
sample code: public class BroadcastingClient { private static DatagramSocket socket = null; public static void main(String[] args) throws IOException { broadcast("Hello", InetAddress.getByName("255.255.255.255")); } public static void broadcast( String broadcastMessage, InetAddress address) throws IOException { socket = new DatagramSocket(); socket.setBroadcast(true); byte[] buffer = broadcastMessage.getBytes(); DatagramPacket packet = new DatagramPacket(buffer, buffer.length, address, 4445); socket.send(packet); socket.close(); } } list broadcast address: List<InetAddress> listAllBroadcastAddresses() throws SocketException { List<InetAddress> broadcastList = new ArrayList<InetAddress>(); Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); while (interfaces.hasMoreElements()) { ...