Java Socket Long Connection code implementation

Server-side programs:

Import Java.io.*;import Java.net.*;import java.util.*;PublicClassChatserver {boolean started =False ServerSocket SS =Null list<client> clients =New Arraylist<client> ();PublicStaticvoidMainstring[] (args) {New Chatserver (). Start ();}PublicvoidStart) {Try {ss =New ServerSocket (8888); started =True System.Out.println ("port is on, occupy 8888 port number ...");Catch (bindexception E) {System.Out.println ("port in use ...."); System.Out.println ("please shut down the program and re-run the server!" "); System.exit (0);}Catch (ioexception e) {e.printstacktrace ();}try {While (started) {Socket s = ss.accept (); Client C =New Client (s); System.Out.println ("a Client connected!");New Thread (c). start (); clients.Add (c);}}Catch (ioexception e) {e.printstacktrace ();}finally {Try {ss.close ();}Catch (ioexception e) {e.printstacktrace ();}}}ClassClientImplementsRunnable {Private Socket s;Private DataInputStream dis =NullPrivate DataOutputStream dos =NullPrivate Boolean bconnected =FalsePublicClient (Socket S) {THIS.S = s;Try {dis =New DataInputStream (s.getinputstream ());d OS =New DataOutputStream (s.getoutputstream ()); bconnected =true;}Catch (ioexception e) {e.printstacktrace ();}}PublicvoidSendString Str) {Try {dos.writeutf (str);}Catch (ioexception E) {clients.Removethis); System.Out.println ("the Other Side withdrew!" I removed it from the list! ");}}PublicvoidRun) {try {While (bconnected) {String str = Dis.readutf (); System.Out.println ( "------------from local server:" + str); for (int i = 0; i < clients.size () ; I++) {Client C = Clients. Get (i); c.send (str);}}} 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 ();}} catch (ioexception e1) {e1.printstacktrace ();}}}}       

Client Program:

Import java.awt.*;Import java.awt.event.*;Import java.io.*;Import java.net.*;/** *@author Michael Huang * * * *PublicClassChatClientExtendsFrame {Socket s =Null;dataoutputstream dos =Null;datainputstream dis =NullPrivateBoolean bconnected =False TextField Tftxt =New TextField (); TextArea tacontent =New TextArea (); Thread TRECV =New Thread (New Recvthread ());PublicStaticvoidMain(string[] Args) {New ChatClient (). Launchframe (8888);}PublicvoidLaunchframe(int Port) {setlocation (400,300);This.setsize (300,Add (tftxt, borderlayout.south), Add (tacontent, borderlayout.north);p ack ();This.addwindowlistener (New Windowadapter () {@OverridePublicvoidWindowclosing(windowevent Arg0) {disconnect (); System.exit (0);}); Tftxt.addactionlistener (New Tflistener ()); setvisible (true); Connect (port); Trecv.start ();}PublicvoidConnect(int Port) {Try {s =New Socket ("127.0.0.1", port);d OS =New DataOutputStream (s.getoutputstream ());d is =New DataInputStream (s.getinputstream ()); System.out.println ("~~~~~~~~ Connection Successful ~~~~~~~~!"); bconnected =true;}Catch (unknownhostexception e) {e.printstacktrace ();}Catch (ioexception e) {e.printstacktrace ();}}PublicvoidDisconnect() {Try {dos.close ();d is.close (); s.close ();}Catch (ioexception e) {e.printstacktrace ();}}PrivateClassTflistenerImplementsActionListener {PublicvoidActionperformed(actionevent E) {String str = tftxt.gettext (). trim (); tftxt.settext ("");Try {dos.writeutf (str);d Os.flush ();}Catch (ioexception e1) {e1.printstacktrace ();}}}private class recvthread implements Runnable { Span class= "hljs-function" >public void run () {try { while (bconnected) {String str = dis.readutf (); tacontent.settext (tacontent.gettext () + str + catch (socketexception e) {System.out.println ( "exited, bye!"); Span class= "hljs-keyword" >catch (eofexception e) {System.out.println ( "exited, bye!");} catch (ioexception e) {e.printstacktrace ();}}}        

Java Socket Long Connection code implementation