Broadcast Data in Network Using UDP Protocol in JAVA

Broadcast.java

package in.asissuthar;

import java.io.IOException;
import java.net.*;
import java.util.Enumeration;
import java.util.List;

/**
 * Created by asissuthar on 11/04/15.
 */
public class Broadcast {
    private DatagramSocket datagramSocket;
    private InetSocketAddress inetSocketAddress;

    public Broadcast(int port) throws SocketException {
        inetSocketAddress = new InetSocketAddress(getAddress(), port);
    }

    public void client() throws SocketException {
        datagramSocket = new DatagramSocket();
        datagramSocket.setBroadcast(true);
    }

    public void server() throws SocketException {
        datagramSocket = new DatagramSocket(inetSocketAddress);
    }

    public void send(byte[] data) throws IOException {
        DatagramPacket datagramPacket = new DatagramPacket(data, data.length, inetSocketAddress);
        datagramSocket.send(datagramPacket);
    }

    public DatagramPacket read(int size) throws IOException {
        byte[] buffer = new byte[size];
        DatagramPacket packet = new DatagramPacket(buffer, size);
        datagramSocket.receive(packet);
        return packet;
    }

    public void close() {
        if (datagramSocket != null) {
            datagramSocket.close();
            datagramSocket = null;
        }
    }

    public static InetAddress getAddress() throws SocketException {
        Enumeration<NetworkInterface> interfaces
                = NetworkInterface.getNetworkInterfaces();
        while (interfaces.hasMoreElements()) {
            NetworkInterface networkInterface = interfaces.nextElement();
            if (networkInterface.isLoopback() || !networkInterface.isUp()) {
                continue;
            }
            List<InterfaceAddress> addresses = networkInterface.getInterfaceAddresses();
            for (InterfaceAddress address : addresses) {
                InetAddress inetAddress = address.getBroadcast();
                if (inetAddress != null) {
                    return inetAddress;
                }
            }
        }
        return null;
    }
}