Fault tolerance client /server

Question

hi
i use a very basic client/server socket program
very similar to sun:
http://java.sun.com/docs/books/tutorial/networking/sockets/clientServer.html
many client can connect to the server...
i would like to add a fault tolerance...
a client try to connect a few time... that don't work, the client try to the second server...
does a need to do something similar to
public class KKMultiServer {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket1 = null;
        ServerSocket serverSocket1 = null;
        boolean listening = true;
        try {
            serverSocket = new ServerSocket(4444);
            serverSocket = new ServerSocket(4445);
        } catch (IOException e) {
            System.err.println("Could not listen on port.");
            System.exit(-1);
        while (listening){
         new KKMultiServerThread(serverSocket1.accept()).start();
            new KKMultiServerThread(serverSocket2.accept()).start();
        serverSocket1.close();
        serverSocket2.close();
}thanks

Answer 1

i need your help to finis my code
what i want to do is to create to start 2 tread of server in my class main server....
and each class server start a thread for each connection...
each time a client do a request, i count it
theses method is in server class
import java.net.*;
import java.io.*;
public class ServerMain {
    public static void main(String[] args) throws IOException {
         //will call 2 time server here         
         Server server1 = new Server();
         Server server2 = new Server();
         server1(4444).start();
         server2(4445).start();
import java.net.*;
import java.io.*;
public class Server extends Thread{
    private static int nbRequete=0;
    public synchronized int ajouterRequete(){
        return nbRequete++;
    public synchronized int getRequete(){
        return nbRequete;
    public int port=0;
    public Server(int port) {
        super("Server");
        this.port = port;
    public void run() {
        ServerSocket serverSocket = null;
        Socket s=null;
        boolean listening = true;
       // Server server = new Server();
       // int port;
        try {
             //will put a port variable
            serverSocket = new ServerSocket(port);
            s=serverSocket.accept();
        } catch (IOException e) {
            System.err.println("Could not listen on port.");
            System.exit(-1);
        System.out.println("server run, wait connecting....");
        while (listening)
            new ServerThread(s).start();
        //serverSocket.close();
import java.net.*;
import java.io.*;
public class ServerThread extends Thread {
    private Socket socket = null;
    public ServerThread(Socket socket) {
        super("ServerThread");
        this.socket = socket;
    public void run() {
        try {
            System.out.println("connexion successfull");
            System.out.println("Attente de l'entree.....");
            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
            BufferedReader in = new BufferedReader(
                        new InputStreamReader(
                            socket.getInputStream()));
            String inputLine, outputLine;
            while ((inputLine = in.readLine()) != null) {
                System.out.println("Server: " + inputLine);
                inputLine = inputLine.toUpperCase();
                out.println(inputLine);
                if (inputLine.equals("Bye."))
                    break;
            out.close();
            in.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
}the server need to have different port
i'm a little bit confuse
i don't know how to finish this project
:confused:
i have some error i don't understand
ServerMain.java:11: cannot find symbol
symbol  : constructor Server()
location: class Server
        Server server1 = new Server();
                         ^
ServerMain.java:12: cannot find symbol
symbol  : constructor Server()
location: class Server
        Server server2 = new Server();
                         ^
ServerMain.java:13: cannot find symbol
symbol  : method server1(int)
location: class ServerMain
        server1(4444).start();
        ^
ServerMain.java:14: cannot find symbol
symbol  : method server2(int)
location: class ServerMain
        server2(4445).start();
        ^
4 errors