Question

I have a little server.jar, which listen to GET and END command on port 10000.

My client code is :

package communication;

import java.io.*;
import java.net.*;

public class Client {

public static void main(String args[]) throws Exception {
    try {

            Socket socket = null;
            PrintWriter out = null;
            BufferedReader in = null;

            socket = new Socket("localhost",10000);
            System.out.println("SOCKET = " + socket);
            System.out.print(socket.getInetAddress() + "\n");
            System.out.print(socket.getInputStream() + "\n");
            System.out.println(socket.isConnected() + "\n");

            out = new PrintWriter(socket.getOutputStream(),true);

            in = new BufferedReader(new 
                            InputStreamReader(socket.getInputStream()));

            String str = "GET";
            out.println(str);   
            String reponse = in.readLine();
            System.out.println(socket.isConnected() + "\n");
            for(int i = 0; i < 10; i++){
                    out.println(str);          // envoi d'un message
                    reponse = in.readLine();      // lecture de la reponse
                    System.out.println("Forme recue: " + reponse);
            }
            System.out.println("END");     // message de terminaison
            out.println("END") ;
            in.close();
            out.close();
            socket.close();

    }
    catch(IOException e) {
            System.out.println(e.getCause());
    }
}
}

I know this code works, because it runs on one of my computers. However, I can’t make it run on another one. Configurations on both are : Windows 7 64, JRE 6, Eclipse.

My server.jar application opens a little GUi that lets me know wether the communication is open or not, which is never the case on the computer that btw get stuck on the readLine() line.

I tried to turn off Windows firewall, antivirus… nothing worked.

Does anyone know what is going wrong here?

thanks!!

Answer 1

Im staring at the localhost string, and have a hunch that could be the problem.

In an answer from this post, there could be something with the :: localhost that needs to be commented, and also hardcoding the localhost as 127.0.0.1 in your C:\Windows\System32\drivers\etc\hosts file.

By hardcoding the localhost with a specific IP address, the server will listen to the same localhost as the one your client program tries to connect to.