Java Network Programming Multi-Threading Client-server

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Threadedclient.java

Package Exercise01;import Java.io.*;import java.net.*;p ublic class Threadedclient {private String hostname;    private int port;        Socket socket = NULL;    Public threadedclient (String hostname, int port) {//constructor of the Client class This.hostname = hostname;    This.port = port; } public void Connect () throws Unknownhostexception, ioexception{System.out.println ("Attempting connect to" + H    Ostname + ":" +port);    Socket = new socket (hostname,port);    System.out.println ("Connection established!");    } public void Readresponse () throws ioexception{String Userinput;    BufferedReader reader = new BufferedReader (New InputStreamReader (Socket.getinputstream ()));    System.out.println ("Response from the server:");    while ((Userinput = Reader.readline ()) = null) {System.out.println (userinput); }} public void Askfortime () throws ioexception{bufferedwriter writer = new BufferedWriter (New OUTPUTSTREAMW Riter (socket.getoutputstreAM ()));    Writer.write ("Time?");    Writer.newline ();    Writer.flush (); } public static void Main (string[] argv) {//create A object for the current class Client threadedclient Clie    NT = new Threadedclient ("localhost", 8181);        try{//trying to establish a connection to the server Client.connect ();        Ask the server for Time Client.askfortime ();        If connection succeed, return the input contents client.readresponse (); }catch (unknownhostexception ukhe) {//if the host not found System.err.println ("host unknown! Connection can not be established! ");} catch (IOException IoE) {//if the server doesn ' t work System.err.println ("Connection can not is established! The server may is not on! Check the error message!    "+ioe.getmessage ()); }    }        }

Threadedserver.java

Package Exercise01;import Java.io.*;import Java.net.*;import Java.util.date;public class Threadedserver {private ServerSocket serversocket;private int port;public threadedserver (int port) {this.port = port;} Get the thread startedpublic void Start () throws Ioexception{system.out.println ("Starting the server at the port:" + por t); serversocket = new ServerSocket (port);//instantial an object Clientsocket client = Null;//set The condition to be true For endless Loopswhile (true) {System.out.println ("Waiting for Clients ..."); client = Serversocket.accept (); System.out.println ("The following client has connected:" + client.getinetaddress (). Getcanonicalhostname ());//A Client have connected to the serverthread thread = new Thread (new Socketclienthandler (client)); Thread.Start ();}} /** * Instantial An object of Class Threadedserver and start the server * * @param argv */public static void Main (string[ ] argv) {//set The default port numberint port = 8181;try{//initializing the socket serverthreadedserVer threadedserver = new Threadedserver (port); Threadedserver.start ();} catch (IOException IoE) {ioe.printstacktrace ();}}} Class Socketclienthandler implements Runnable{private socket Client;public Socketclienthandler (socket client) { this.client = client;} /** * Get the thread started by the Run method */@Overridepublic void Run () {try{system.out.println ("thread started with n Ame: "+ thread.currentthread (). GetName ()); Readresponse ();} catch (IOException IoE) {ioe.printstacktrace ();} catch (Interruptedexception IE) {ie.printstacktrace ();}}  /** * Read the response from the server * @throws IOException * @throws interruptedexception */private void Readresponse () Throws IOException, interruptedexception {String userinput; BufferedReader reader = new BufferedReader (New InputStreamReader (Client.getinputstream ())); while (Userinput = Reader.readline ()) = null) {if (Userinput.equals ("Time?")) {System.out.println ("Request to send time! Sending time current. "); Sendtime (); break;}}} /** * Send the current time to thE Server * @throws IOException * @throws interruptedexception */private void Sendtime () throws IOException, Interruptedexc eption {bufferedwriter writer = new BufferedWriter (New OutputStreamWriter (Client.getoutputstream ())); Writer.write ( New Date (). toString ()); Writer.flush (); Writer.close ();}}

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Java Network Programming Multi-Threading Client-server