Java using socket network programming to realize multi-person chat room __ algorithm

The socket (socket) programming can realize the communication between the server and the client, the following through the socket programming combined with multithreading to achieve a multiplayer chat room.
Program Show:

Interface Class

1. Client Interface Clientview.java

public class Clientview extends JFrame implements ActionListener, KeyListener, Runnable {private JTextArea textArea;
    Private JTextField TextField, tfname;
    Private JButton btnsend, Btnid;
    Private JLabel label;
    Private JPanel jp1, JP2;
    public Boolean isconnect = false;
    Private socket socket = NULL;
    Private DataInputStream InputStream = null;
    Private DataOutputStream outputstream = null;
    Private JScrollPane ScrollPane;

    private static Clientview view;
    Public JTextArea Gettextarea () {return textArea;
    Public DataInputStream getInputStream () {return inputstream;
    Public DataOutputStream Getoutputstream () {return outputstream;
        public static void Main (string[] args) {view = new Clientview ();
        ServiceView.clientViews.add (view);
        Thread thread = new thread (view);
    Thread.Start ();
        Public Clientview () {Initview (); try {SocKet = new Socket ("localhost", 9090);//connect local server} catch (Unknownhostexception e) {e.printstacktrace ();
        catch (IOException e) {e.printstacktrace ();
        } private void Initview () {TextArea = new JTextArea (20, 20);
        Textarea.seteditable (FALSE);
        ScrollPane = new JScrollPane (TextArea);
        TextField = new JTextField (15);
        Textfield.addkeylistener (this);
        Btnsend = new JButton ("send");
        Btnsend.addactionlistener (this);
        label = new JLabel ("nickname:");
        Tfname = new JTextField (8);
        JP1 = new JPanel ();
        JP2 = new JPanel ();
        Jp1.add (label);
        Jp1.add (tfname);
        Tfname.settext ("User 0");
        Jp1.setlayout (New FlowLayout (Flowlayout.center));
        Jp2.add (TextField);
        Jp2.add (Btnsend);

        Jp2.setlayout (New FlowLayout (Flowlayout.center));
        Add (Jp1, Borderlayout.north);
        Add (ScrollPane, borderlayout.center); Add (JP2, Borderlayout.south);
        Settitle ("chat room");
        SetSize (500, 500);
        setlocation (450, 150);
        SetVisible (TRUE);
        Setdefaultcloseoperation (Exit_on_close); Addwindowlistener (New Windowadapter () {//window closed after disconnecting @Override public void windowclosing (Windoweven
                    T e) {try {if (socket!= null) socket.close ();
                    if (inputstream!= null) inputstream.close ();
                if (outputstream!= null) outputstream.close ();
                catch (IOException E1) {e1.printstacktrace ();
    }
            }
        }); @Override public void actionperformed (ActionEvent e) {if (e.getsource () = = Btnsend) {Send
        MSG ();
            }} private void Sendmsg () {try {String s = textfield.gettext (); if (!s.equals ("")) {//Send Data Textfield.settext ("");
                Textarea.append ("I (" + tfname.gettext () + "): \ r \ n" + S + "\ r \ n");
                OutputStream = new DataOutputStream (Socket.getoutputstream ()); 
                Outputstream.writeutf (Tfname.gettext () + "#" + s);
            Outputstream.flush ();
        } catch (IOException e) {e.printstacktrace (); @Override public void keypressed (KeyEvent arg0) {if (Arg0.getkeycode () = Keyevent.vk_enter)
        {sendmsg (); @Override public void keyreleased (KeyEvent arg0) {} @Override public void keytyped (Keyeven T arg0) {} @Override public void Run () {try {InputStream = new DataInputStream (socket

            . getInputStream ());
                while (true) {string[] s = Inputstream.readutf (). Split ("#");
            Textarea.append (S[0] + ": \ r \ n" + s[1] + "\ r \ n"); }
        } catch (IOException e) {}}} 

2. Server Interface Serviceview.java

public class Serviceview extends JFrame implements actionlistener{private JButton btnopen, btnstop;
    Private JLabel label;
    Private service service = NULL;
    public static arraylist<clientview> clientviews = new arraylist<> ();

    private static Serviceview view;
    public static Serviceview GetView () {return view;
    public static void Main (string[] args) {view = new Serviceview ();
    Public Serviceview () {Initview ();
        private void Initview () {btnopen = new JButton ("Open Server");
        Btnstop = new JButton ("Shut Down server");
        Btnstop.setenabled (FALSE);
        Btnopen.addactionlistener (this);
        Btnstop.addactionlistener (this);
        label = new JLabel ("Server stops working");
        Add (label);
        Add (Btnopen);
        Add (Btnstop);
        Settitle ("server");
        SetLayout (New GridLayout (3, 1, 0, 10));
        SetSize (300, 300);
        setlocation (450, 150);
        SetVisible (TRUE); SetdefAultcloseoperation (Exit_on_close); @Override public void actionperformed (ActionEvent e) {if (e.getsource () = = Btnopen) {Open
        ();
        else {stop ();
        } public void Open () {//Open Server service = new service ();
        Thread thread = new thread (service);
        Thread.Start ();
        Label.settext ("server is Running");
        Btnopen.setenabled (FALSE);
    Btnstop.setenabled (TRUE);
        public void Stop () {//Shut Down Server Label.settext ("server is closed");
        Btnopen.setenabled (TRUE);
        Btnstop.setenabled (FALSE); try {synchronized (clientmannager.sockets) {//close each connection for (Chatsocket Socket:clientmannager
                    . Sockets) {Socket.getinputstream (). Close ();
                Socket.getoutputstream (). Close ();
            } ClientMannager.sockets.removeAllElements ();
        for (Clientview view:clientviews) {        View.getinputstream (). Close ();
            View.getoutputstream (). Close ();
        } service.getserversocket (). Close ();
        catch (IOException e) {e.printstacktrace (); }
    }

}

Functional Class

1.chatsocket.java

* * Use socket to obtain data flow, to achieve the purpose of transmitting data/public class Chatsocket implements runnable{private socket socket = NULL;
    Private DataInputStream InputStream = null;

    Private DataOutputStream outputstream = null;
    Public DataInputStream getInputStream () {return inputstream;
    Public DataOutputStream Getoutputstream () {return outputstream;
        Public chatsocket (socket socket) {this.socket = socket;
            try {inputstream = new DataInputStream (Socket.getinputstream ());
        OutputStream = new DataOutputStream (Socket.getoutputstream ());
        catch (IOException e) {e.printstacktrace ();
            The public void Send (String send) {//Send data try {outputstream.writeutf (send) to the client;
        Outputstream.flush ();
        catch (IOException e) {e.printstacktrace ();

        @Override public void Run () {///loop reads the data sent by the client String accept = NULL; WHile (True) {try {accept = Inputstream.readutf ();
            Clientmannager.sendall (this, accept);
            catch (IOException e) {ClientMannager.sockets.remove (this); }
        }
    }
}

2.clientmannager.java

/* Client Manager *
/public class Clientmannager {

    private Clientmannager () {
    } public

    static vector< chatsocket> sockets = new vector<> ();

    Send data public
    static void Sendall (Chatsocket chatsocket, String send) to other clients {for
        (Chatsocket socket:sockets) { C7/>if (!chatsocket.equals (socket)) {
                socket.send (send);}}}

3.service.java

/* server-side, use thread to achieve the purpose of loop waiting for connection/public class Service implements runnable{private ServerSocket serv

    Ersocket = null;
    Public ServerSocket Getserversocket () {return serversocket;
            @Override public void Run () {try {serversocket = new ServerSocket (9090);//Create Port
                while (true) {///on-receiving client's connection socket socket = serversocket.accept ();
                Joptionpane.showmessagedialog (Serviceview.getview (), "Client connection port", "TIP", joptionpane.information_message); Chatsocket chatsocket = new Chatsocket (socket); New Client Connection ClientMannager.sockets.add (Chatsocket); Add Customer thread thread = new Thread (chatsocket) to the client manager;

            Enabling threading causes the server to start receiving client information Thread.Start ();
            } catch (IOException e) {e.printstacktrace ();
        SYSTEM.OUT.PRINTLN ("Server shutdown"); }
    }

}