Java implementation of multiplayer online chat room (socket and serversocket application) __java

First place Effect chart:

Landing:

/** ChatClient class */import Java.awt.BorderLayout in the vicinity of the 109 lines of this class;
Import Java.awt.FlowLayout;
Import Java.awt.Toolkit;
Import Java.io.File;
Import java.io.IOException;
Import Java.net.Socket;
Import java.net.UnknownHostException;
Import Java.awt.event.ActionListener;
Import java.awt.event.ActionEvent;
Import Javax.swing.BorderFactory;
Import Javax.swing.Icon;
Import Javax.swing.ImageIcon;
Import Javax.swing.JButton;
Import Javax.swing.JFrame;
Import Javax.swing.JLabel;
Import Javax.swing.JOptionPane;
Import Javax.swing.JPanel;
Import Javax.swing.JPasswordField;
Import Javax.swing.JTextField;
Import Javax.swing.border.Border;
Import Javax.swing.border.EtchedBorder;


Import Javax.swing.border.TitledBorder;
    public class Clientlogin extends JFrame {private JTextField nametext;
    Private JPasswordField Passwordtetx;
   
    Private Object Bpanel;       Public Clientlogin () {this.init ();
        Init method initializes this.setdefaultcloseoperation (Exit_on_close); ThiS.setvisible (TRUE);
        public void init () {this.settitle ("Stay-meng Chat room login");     This.setsize (330,230);
        Borrow Mature and beautiful dimensions int y = (int) toolkit.getdefaulttoolkit (). Getscreensize (). GetHeight ();
                int x = (int) toolkit.getdefaulttoolkit (). Getscreensize (). GetWidth ();
                 /** above method is hard to remember without the help of Eclipse, ni.
      * */This.setlocation ((X-this.getwidth ())/2, (Y-this.getheight ())/2);     This.setresizable (FALSE);
      Do not allow users to change their size icon icon = new ImageIcon ("D:" +file.separator+ "login.jpg");   JLabel label = new JLabel (icon);
     
      Set the landing interface on the border This.add (Label,borderlayout.north);
      JPanel Mainpanel = new JPanel ();
      Border Border = Borderfactory.createetchedborder (etchedborder.lowered);
      Mainpanel.setborder (Borderfactory.createtitledborder (Border, "Input login Information", titledborder.center,titledborder.top));     This.add (Mainpanel,borderlayout.center); Add the main panel to the frame Mainpanel.setlayoUT (NULL);
      JLabel Namelabel = new JLabel ("Please enter a nickname");
      Namelabel.setbounds (30,30,80,22);
      Mainpanel.add (Namelabel);
      Nametext = new JTextField ();
      Nametext.setbounds (115,30,120,22);
      Mainpanel.add (Nametext);
      JLabel Passwordlabel = new JLabel ("Please enter password");
      Passwordlabel.setbounds (30,60,80,22);
      Mainpanel.add (Passwordlabel);
      Passwordtetx = new JPasswordField ();
      Passwordtetx.setbounds (115,60,120,22);
     
      Mainpanel.add (PASSWORDTETX);
     Next button position emission JPanel Bpanel = new JPanel ();
     Bpanel.setlayout (New FlowLayout (flowlayout.right));
     This.add (Bpanel,borderlayout.south);
     JButton reset = new JButton ("reset");
             Reset.addactionlistener (new ActionListener () {//For reset button to add event listener public void actionperformed (ActionEvent e) {
             Nametext.settext ("");
         Passwordtetx.settext ("");
     }
         });
     
     Bpanel.add (reset);
     
 /** below Start implementation Submit Button * * * *    JButton Submit = new JButton ("Landing");  Submit.addactionlistener (This) (new loginaction);
Because landing relatively complex, again for landing write a class bpanel.add (submit);
    Under/** Start Write Login class * */Class Loginaction implements ActionListener {private JFrame self;
    Public loginaction (JFrame self) {this.self = self; The public void actionperformed (ActionEvent e) {//system.out.println ("username is:" +nametext.gettext () + "password is:" +ne
        W String (Passwordtext.getpassword ()));
            try {//Start connecting to the server socket socket = new Socket ("127.0.0.1", 8888);
            New ChatClient (Socket,nametext.gettext ());
        Call Dispose method to close the landing box Self.dispose ();
            }catch (unknownhostexception E1) {e1.printstacktrace ();
        Joptionpane.showconfirmdialog (self, "cannot find the specified server!~", "Connection Failed", joptionpane.ok_option,joptionpane.error_message);
            }catch (IOException E1) {e1.printstacktrace (); Joptionpane.showconfirmdialog (SElf, "Connection server error, please try again."
        "," Connection Failed ", joptionpane.ok_option,joptionpane.error_message);
    }} public static void Main (String args[]) {new Clientlogin ();
 }
}

Client:

Import Java.awt.BorderLayout;
Import Java.awt.FlowLayout;
Import Java.awt.Toolkit;
Import java.awt.event.ActionEvent;
Import Java.awt.event.ActionListener;
Import Java.io.BufferedReader;
Import java.io.IOException;
Import Java.io.InputStreamReader;
Import Java.io.OutputStreamWriter;
Import Java.io.PrintWriter;
Import Java.net.Socket;
Import Java.util.Date;
Import Java.text.SimpleDateFormat;
Import Javax.swing.JButton;
Import Javax.swing.JFrame;
Import Javax.swing.JLabel;
Import Javax.swing.JPanel;
Import Javax.swing.JScrollPane;
Import Javax.swing.JSplitPane;


Import Javax.swing.JTextArea;                  public class ChatClient extends JFrame {private socket socket;        Responsible for and server communication private JTextArea Sendarea;   Message editing area private JTextArea Contentarea;                   Group Chat message Display box private String name;
        The current user name is public chatclient (socket socket,string name) {this.socket = socket;
        THIS.name = name;       This.init (); Initializing a chat client
        This.setdefaultcloseoperation (Exit_on_close);
       
        This.setvisible (TRUE);  /* Next start a separate thread to read data specifically from the server * */clientthread thread = new Clientthread (Socket,contentarea)
        ;
    Thread.Start ();
        public void init () {this.settitle ("My chat room");
        This.setsize (300,400);
        int x = (int) toolkit.getdefaulttoolkit (). Getscreensize (). GetWidth ();
       
        int y = (int) toolkit.getdefaulttoolkit (). Getscreensize (). GetHeight ();
        This.setlocation ((X-this.getwidth ())/2, (Y-this.getheight ())/2);      This.setresizable (FALSE);
        Do not allow user to change size Contentarea = new JTextArea ();  Contentarea.setlinewrap (TRUE); Line-Wrapping method JScrollPane Logpanel = new JScrollPane (Contentarea, Jscrollpane.vertical_scrollbar_as_need
       
        ED, Jscrollpane.horizontal_scrollbar_never);
        Sendarea = new JTextArea ();    Sendarea.setlinewrap (TRUE); //Controls the maximum length of each line display not exceeding the interface length JScrollPane Sendpanel = new JScrollPane (Sendarea, Jscrollpane.vertical_scrollba
       
        r_as_needed, Jscrollpane.horizontal_scrollbar_never);
        Create a divider pane jsplitpane Splitpane = new JSplitPane (Jsplitpane.vertical_split,logpanel,sendpanel);
        Splitpane.setdividerlocation (250);
       
        This.add (Splitpane,borderlayout.center);
        Button panel JPanel bpanel = new JPanel ();
        Bpanel.setlayout (New FlowLayout (flowlayout.right));
       
        This.add (Bpanel,borderlayout.south);
        JLabel Namelabel = new JLabel ("nickname:" +this.name+ ");
       
        Bpanel.add (Namelabel);
        JButton CloseButton = new JButton ("close");
               
            Closebutton.addactionlistener (new ActionListener () {public void actionperformed (ActionEvent e) {
        }
        });
       
        Bpanel.add (CloseButton); JButton Sendbutton = new JButton ("Send"); Sendbutton.addactionlistener (new ActionListener () {//@Override public void actionperformed (Action
                Event arg0) {//TODO auto-generated method stub String str = Sendarea.gettext ();
                SimpleDateFormat formater = new SimpleDateFormat ("HH:mm:ss");
                String time = Formater.format (new Date ());
                String sendstr = name+ "+time+" said: "+STR;"
                PrintWriter out = null;
                    try {out = new PrintWriter (New OutputStreamWriter (Socket.getoutputstream ()));
                    Out.println (SENDSTR);
                Out.flush ();
                }catch (Exception E1) {e1.printstacktrace ();
            } sendarea.settext ("");
       
        }
        });   
    Bpanel.add (Sendbutton);
    }///client-server-side communication thread class Clientthread extends thread {private socket socket; PrivAte JTextArea Contentarea;
        Public Clientthread (socket socket, JTextArea contearea) {this.socket = socket;
    This.contentarea = Contearea;
        public void Run () {BufferedReader br = null;
            try {br = new BufferedReader (New InputStreamReader (Socket.getinputstream ()));
                    String str = NULL;
                        while (str = Br.readline ())!= null) {System.out.println (str);
                        Contentarea.append (str);
                    Contentarea.append ("\ n");
        } catch (IOException e) {e.printstacktrace ();
                finally {if (br!= null) {try {br.close ();
            }catch (IOException e) {e.printstacktrace (); }
        }
    }
}}

Server side:

Import java.util.List;
Import Java.io.BufferedReader;
Import java.io.IOException;
Import Java.io.InputStreamReader;
Import Java.io.OutputStreamWriter;
Import Java.io.PrintWriter;
Import Java.net.ServerSocket;
Import Java.net.Socket;


Import java.util.ArrayList;    public class Chatserver {private list<socket> sockets = new arraylist<socket> ();
        The application of the class set is public Chatserver () throws IOException {ServerSocket ss = new ServerSocket (8888);
       
        SYSTEM.OUT.PRINTLN ("Server is listening on port 8888");
            while (true) {Socket socket = ss.accept ();
            Sockets.add (socket);
            String IP = socket.getinetaddress (). gethostaddress (); SYSTEM.OUT.PRINTLN ("New user entered.")
            IP is "+ip";
            Thread thread = new Thread (new Serverrunner (Sockets,socket));
        Thread.Start ();
        } public static void Main (String args[]) {try {new chatserver (); catch (Exception e) {E.priNtstacktrace ();
    }} class Serverrunner implements Runnable {private list<socket> sockets;   Private Socket Currentsocket;  Current Socket public Serverrunner (list<socket> sockets,socket currentsocket) {this.sockets = sockets
        ;
    This.currentsocket = Currentsocket;
        public void Run () {String IP = currentsocket.getinetaddress (). gethostaddress ();
        BufferedReader br = null;
            try {br = new BufferedReader (New InputStreamReader (Currentsocket.getinputstream ()));
            String str = NULL;
                while (str = Br.readline ())!= null) {SYSTEM.OUT.PRINTLN (ip+ "said" +str); Write information to all clients for (Socket temp:sockets) {printwriter pw = new Print
                    Writer (New OutputStreamWriter (Temp.getoutputstream ()));
                    Pw.println (str);
                Pw.flush ();
          }  }}catch (IOException e) {e.printstacktrace ();
 }
    }
}