Java Online chat Project version 0.8 enables the return of information received by the server to the display function in each client window

The way iterators are generated locks

The server side increases the functionality that is sent to each client that has received information

So when we get to a socket and open its thread to loop the receiving client to send the message, we save the thread client of this inner class to the collection list<client>

Then, after reading the client information, send this message to all the ports

by looping

for (int i=0;i<clients.size (); i++) {

Client C=clients.get (i);

C.send (str);

}

Sent to each client that has successfully connected to the server

Detailed code changes for the server are as follows:

 PackageCom.swift;ImportJava.io.DataInputStream;ImportJava.io.DataOutputStream;Importjava.io.EOFException;Importjava.io.IOException;Importjava.net.BindException;ImportJava.net.ServerSocket;ImportJava.net.Socket;Importjava.util.ArrayList;ImportJava.util.Iterator;Importjava.util.List; Public classChatserver {Booleanstarted =false; ServerSocket SS=NULL; Socket s=NULL; List<Client> clients=NewArraylist<client>();  Public Static voidMain (string[] args) {Newchatserver (). Fun (); }    Private voidFun () {Try{SS=NewServerSocket (8888); Started=true; } Catch(bindexception e) {System.out.println ("Port in use ..."); } Catch(IOException E1) {e1.printstacktrace (); }        Try {             while(started) {s=ss.accept (); System.out.println ("A client connected success"); Client C=NewClient (s); NewThread (c). Start ();            Clients.add (c); }        } Catch(eofexception e) {System.out.println ("Client has closed."); } Catch(Exception e) {e.printstacktrace (); } finally {            Try{ss.close (); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        }    }    classClientImplementsRunnable {PrivateSocket S; PrivateDataInputStream Dis; PrivateDataOutputStream dos; Private BooleanConnected =false;  PublicClient (Socket s) { This. S =s; Try {                 This. Dis =NewDataInputStream (S.getinputstream ());  This. dos =NewDataOutputStream (S.getoutputstream ()); Connected=true; } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        }        Private voidSend (String str) {Try{dos.writeutf (str); } Catch(IOException e) {//TODO auto-generated Catch blockE.printstacktrace ();        }; } @Override Public voidrun () {Try{//Note: to include a while loop, a socket closed exception occurs if the try is in the while loop                 while(connected) {String str=Dis.readutf ();                    System.out.println (str);  for(intI=0;i<clients.size (); i++) {Client C=Clients.get (i);                    C.send (str); }                    //For (iterator<client> it=clients.iterator (); It.hasnext ();) {//Client C=it.next ();//method Two, not advisable, with synchronous lock//c.send (str);//                     }                    //iterator<client> it=clients.iterator ();//While (It.hasnext ()) {//Client C=it.next ();//method Three, not advisable, there is a synchronous lock, the modification need to lock (not modified at this time)//c.send (str);//                    }                                     }            } Catch(IOException e) {e.printstacktrace (); } finally {                if(Dis! =NULL) {                    Try{dis.close (); } Catch(IOException e) {e.printstacktrace (); }                }                if(s! =NULL) {                    Try{s.close (); } Catch(IOException e) {e.printstacktrace (); }                }                if(dos!=NULL) {                    Try{dos.close (); } Catch(IOException e) {e.printstacktrace (); }                }            }        }    }}

Java Online chat Project version 0.8 enables the return of information received by the server to the display function in each client window