Java Simple chat Room 1.2

System is exiting

Notify the server first, and let the server do what it does.

Stop the thread, listen for a while, time to cut off

Server Side

Importjava.net.*;ImportJava.io.*;ImportJava.util.*; Public classChatserver {BooleanStarted=false;//there's no monitoring.ServerSocket ss=NULL;//Initializelist<client>clients=NewArraylist<client>();  Public Static voidMain (string[] args) {Newchatserver (). Start (); }             Public voidstart () {Try{SS=NewServerSocket (8888);//Port number 8888,TCP, listening on port 8888Started=true;//Connect on}Catch(bindexception e) {System.out.println ("Port in Use"); System.exit (0); }Catch(IOException e) {e.printstacktrace ();//gives the method's calling program, until the exception is generated.        }        Try{                         while(started)//has started{Socket s=ss.accept ();//a connection has been initiated to receive clients continuouslyClient c=NewClient (s);//after receiving a thread that comes upSYSTEM.OUT.PRINTLN ("A client connected!"); NewThread (c). Start ();//let this thread start, serve itClients.add (c); //dis.close ();                }                            }Catch(IOException e) {e.printstacktrace (); }finally{                Try{ss.close (); }Catch(IOException e) {e.printstacktrace (); }            }    }        classClientImplementsrunnable{//thread Inner class                PrivateSocket s;//Each client is packaged with a separate socket, a semi-connected        PrivateDataInputStream dis=NULL;//each client retains its own inputstream; the input pipeline from which the contents of the socket are gambled//Keep a connection of your own        PrivateDataOutputStream dos=NULL; Private BooleanBconnected=false;//if it is connected, initialize false         PublicClient (Socket s) {//Pass the Socket property, constructor             This. s=s;//Initialize            Try{dis=NewDataInputStream (S.getinputstream ());//Initializedos=NewDataOutputStream (S.getoutputstream ()); bconnected=true;//equals True after the connection}Catch(IOException e) {e.printstacktrace (); }        }                 Public voidSend (String str) {Try{dos.writeutf (str); } Catch(IOException e) {e.printstacktrace (); }        }                             Public voidRun () {//separate threads for individual client services//becomes true after receiving the other party            Try{               while(bconnected) {//there's something to attend.String Str=dis.readutf ();//blocked, accept the string that the client gave me and printSystem.out.println (str);  for(intI=0;i<clients.size (); i++) {//Collection ClassClient c=Clients.get (i); C.send (str); System.out.println ("Made a statement."); }                                /*For (iterator<client> it=clients.iterator (); It.hasnext ();) {Client c=it.next ();                C.send (str); }*/                /*Iterator it=clients.iterator ();                    while (It.hasnext ()) {Client c=it.next ();                                    C.send (str); }//internal locking, no need for low efficiency*/               }            }Catch(eofexception e) {System.out.println ("Client closed!"); }             Catch(IOException e) {e.printstacktrace (); }finally{                Try{                    if(Dis! =NULL) Dis.close (); if(Dos! =NULL) Dos.close (); if(s!=NULL) {s.close (); //S=null;                    }                }Catch(IOException E1) {e1.printstacktrace (); }            }                    }    }}

Client

Importjava.awt.*;Importjava.awt.event.*;Importjava.io.IOException;Importjava.net.*;ImportJava.io.*; Public classChatClientextendsframe{Socket S=NULL; DataOutputStream dos=NULL; DataInputStream Dis=NULL; Private Booleanbconnected =false; TextField Tftxt=NewTextField ();//only one line can be written, there is an actionTextArea tacontent=NewTextArea ();//tags define multiple lines of text input controlsThread trecv=NewThread (NewRecvthread ());  Public Static voidMain (string[] args) {Newchatclient ().       Launchframe (); }         Public voidLaunchframe () {setlocation (400,300);  This. SetSize (300,300);        Add (Tftxt,borderlayout.south);        Add (Tacontent,borderlayout.north);        Pack ();  This. Addwindowlistener (NewWindowadapter () {//Close Window@Override Public voidwindowclosing (windowevent e) {disconnect (); System.exit (0); }                    });//Anonymous ClassTftxt.addactionlistener (NewTflistener ()); SetVisible (true);        Connect (); //New Thread (New Recvthread ()). Start ();Trecv.start (); }         Public voidConnect () {Try{s=NewSocket ("127.0.0.1", 8888); DOS=NewDataOutputStream (S.getoutputstream ()); Dis=NewDataInputStream (S.getinputstream ());//InitializeSystem.out.println ("connected!"); bconnected=true; } Catch(unknownhostexception e) {e.printstacktrace (); } Catch(IOException e) {e.printstacktrace (); }            }         Public voidDisconnect ()//Close Method    {        Try{dos.close ();          Dis.close ();          S.close (); }Catch(IOException e) {e.printstacktrace (); }                        /*try{bconnected=false;//Close thread trecv.join ();//merge}catch (interruptedexceptio        n e) {e.printstacktrace ();             }finally{try{dos.close ();            Dis.close ();        S.close ();            }catch (IOException e) {e.printstacktrace (); }        }*/    }    Private classTflistenerImplementsActionListener { Public voidactionperformed (ActionEvent e) {//One hit EnterString str=tftxt.gettext (). Trim (); //Tacontent.settext (str);Tftxt.settext ("");//empty after carriage return            Try {                //dataoutputstream dos=new DataOutputStream (S.getoutputstream ());Dos.writeutf (str);//output the stream.Dos.flush (); //dos.close ();}Catch(IOException E1) {e1.printstacktrace (); }                    }                }//Inner class    Private classRecvthreadImplementsrunnable{ Public voidrun () {Try{               while(bconnected) {String str=Dis.readutf ();                  System.out.println (str); Tacontent.settext (Tacontent.gettext ()+str+ ' \ n '); }            }Catch(SocketException e) {System.out.println (Exit); }Catch(IOException e) {e.printstacktrace (); }                    }    }}

Java Simple chat Room 1.2