UDP多线程在线咨询

发送端：

public class TalkSend implements  Runnable{
    DatagramSocket socket = null;
    BufferedReader br = null;

    private int fromPort;
    private String toIP;
    private int toPort;

    public  TalkSend(int fromPort,String toIP,int toPort){
        this.fromPort = fromPort;
        this.toIP = toIP;
        this.toPort = toPort;
        try {
            socket = new DatagramSocket();
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (SocketException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public void run() {


        while (true){
            String s = null;
            try {
                s = br.readLine();
                byte[] datas = s.getBytes();
                DatagramPacket packet = new DatagramPacket(datas, 0, datas.length, new InetSocketAddress(this.toIP, this.toPort));

                socket.send(packet);
                if (s.equals("bye")){
                    break;
                }

            } catch (IOException e) {
                throw new RuntimeException(e);
            }

        }
        socket.close();
    }
}

接受端：

public class TalkReceive implements Runnable{
    DatagramSocket socket = null;
    private int port;
    private String mygFrom;

    public TalkReceive(int port,String mygFrom){
        this.port = port;
        this.mygFrom = mygFrom;
        try {
            socket = new DatagramSocket(port);
        } catch (SocketException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public void run() {

        while (true){


            try {
                byte[] container = new byte[1024];
                DatagramPacket packet = new DatagramPacket(container, 0, container.length);
                socket.receive(packet);
                byte[] data = packet.getData();
                String receiveData = new String(data, 0, packet.getLength());

                System.out.println(mygFrom+":"+receiveData);

                if (receiveData.equals("bye")){
                    break;
                }
            } catch (IOException e) {
                throw new RuntimeException(e);
            }



        }
        socket.close();
    }


}

类：

public class TalkStudent {
    public static void main(String[] args) {
        //开启两个线程
        new Thread(new TalkSend(7777,"localhost",9999)).start();
        new Thread((new TalkReceive(8888,"老师"))).start();
    }
}

public class TalkTeacher {
    public static void main(String[] args) {
        new Thread(new TalkSend(5555,"localhost",8888)).start();
        new Thread(new TalkReceive(9999,"学生")).start();
    }
}