Java multi-threading, Socket simple analog chat software

Import java.io.*;
Import Java.net.ServerSocket;

Import Java.net.Socket;
/** * Create by wdful * email:wdful165177@gmail.com * DATE:2017/4/7 * * * * Chat program one thread control to receive a line program-controlled delivery at the same time///Send End

    Class Client implements Runnable {private Socket s;
    Public Client (Socket s) {this.s = s; @Override public void Run () {while (true) {System.out.println (Thread.CurrentThread () + Client
            Send a message: ");
            BufferedReader ins = new BufferedReader (new InputStreamReader (system.in));
            String str = NULL;
                try {str = ins.readline ();
                In order to send the data to obtain the output stream in the socket outputstream out = S.getoutputstream ();
                Out.write (Str.getbytes ());
                    if ("886". Equals (str)) {System.out.println (Thread.CurrentThread () + ": Bye");
                    S.close ();
                System.exit (0);
            } catch (IOException e) {    E.printstacktrace ();
            //Get data inputstream in = NULL;
                try {in = S.getinputstream ();
                byte[] data = new byte[1024];
                int len = in.read (data);
                System.out.println (Thread.CurrentThread () + "server-side said to the client:");
            System.out.println (new String (data, 0, Len));
            catch (IOException e) {e.printstacktrace ();
    Class Serverclient implements Runnable {private ServerSocket SS;

    Private Socket S;
    Public Serverclient (ServerSocket ss) {THIS.SS = SS;
        @Override public void Run () {System.out.println ("Server start ...");
            Establish a service-side socket service and listen on a port//Get Client object try {s = ss.accept (); Connection Status System.out.println ("Connected:" + s.getinetaddress (). Gethostaddress (). toString () + "PORT:" + S.getpor
        T ());
catch (IOException e) {            E.printstacktrace (); SYSTEM.OUT.PRINTLN ("Get client failed.)
        ");
                } while (true) {try {//Read data InputStream in = S.getinputstream ();
                byte[] data = new byte[1024];
                int len = in.read (data);
                String str = new string (data, 0, Len);
                    if ("886". Equals (str)) {System.out.println (Thread.CurrentThread () + ": Bye");
                    Ss.close ();
                    S.close ();
                System.exit (0);
                System.out.println (Thread.CurrentThread () + "Client on the server said:");
                System.out.println (str);
                System.out.println (Thread.CurrentThread () + "service End-to-end message:");
                BufferedReader ins = new BufferedReader (new InputStreamReader (system.in));
                In order to send the data to obtain the output stream in the socket outputstream out = S.getoutputstream (); Out.write (Ins.readline (). GetBytes ());
            catch (IOException e) {e.printstacktrace ();
        Class Chatdemo {public static void main (string[] args) throws IOException {//server-side Startup
        Serverclient serverclient = new Serverclient (new ServerSocket (10000));
        Thread t2 = new Thread (serverclient);
        T2.start ();
        Client-Initiated clients = new Client (new Socket ("127.0.0.1", 10000);
        thread T1 = new thread (client);
    T1.start (); }
}