java udp broadcast

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();    }}