Implementing Server and Client (TCP) using Java

Server.java

Import Java.io.*;import java.net.*;p ublic class Server {public static final int port=8888;        public void Server () throws IOException {ServerSocket ss = new ServerSocket (PORT);        InetAddress ia = inetaddress.getbyname (null);        System.out.println ("[email protected]" +ia+ "start!");                try{while (true) {Socket s = ss.accept ();//Listen PORT;                try{new ServerOne (s);                } catch (IOException e) {s.close ();            }}}finally{Ss.close ();        System.out.println ("Server stop!");    }}}class ServerOne extends Thread {private Socket s;    Private BufferedReader in;    Private PrintWriter out;        Public ServerOne (Socket s) throws IOException {this.s = s;        in = new BufferedReader (New InputStreamReader (S.getinputstream ())); out = new PrintWriter (new BufferedWriter (New OUTPUTSTREAMWRiter (S.getoutputstream ())), true);    Start ();                public void Run () {try {while (true) {String str = in.readline ();                if (Str.equals ("End")) break;                SYSTEM.OUT.PRINTLN ("server:receive Information" +str);            Out.println ("Echo:" +str);        } System.out.println ("Closing ...");            } catch (IOException e) {} finally {try{s.close (); }catch (IOException e) {}}}}

Client.java:

Import Java.io.*;import java.net.*;p ublic class Client extends Thread {static final int max_threads=25;    private static int id = 0;    private static int threadcount = 0;    Private Socket S;    Private BufferedReader in;    Private PrintWriter out;    public static int Getthreadcount () {return threadcount;        } public Client (InetAddress ia) {threadcount++;        id++;        SYSTEM.OUT.PRINTLN ("Making client:" + ID);        try{s = new Socket (IA, server.port);            } catch (IOException e) {} try{in = new BufferedReader (New InputStreamReader (S.getinputstream ()));            out = new PrintWriter (new BufferedWriter (New OutputStreamWriter (S.getoutputstream ())), true);        Start ();            }catch (IOException E1) {try{s.close ();            }catch (IOException E2) {System.out.println ("Error in client\n");  }}} public void Run () {try{          String str;                for (int i = 0; i < 5; i++) {out.println ("Client #" +id+ ":" +i);                Str=in.readline ();            System.out.println ("Client:send message#" +id+ ":" +i+ "\ n" + "Server reply:" +str);        } out.println ("End");            }catch (IOException e) {}finally{try {s.close ();  } catch (IOException e) {}}} public static void Main (String args[]) throws IOException, Interruptedexception {InetAddress ia = inetaddress.getbyname (null);//null mean localhost while (true) {if (GETTHREADC            Ount () < max_threads) New Client (IA);            else break;        Thread.CurrentThread (). Sleep (10); }    }}

Implementing Server and Client (TCP) using Java