need an advice

the first problem is that you are using the same logic for your client as the server. You don't create a new ServerSocket in the client, you connect to the socket you created in the server.

Socket connection = new Socket("localhost",5000);

Your code still needs work, but you wuill see that once you run it.

~Tim

SomeoneElsea at 2007-7-12 19:41:50 >

Here's one I prepared yesterday... straight out of the sun tut's, except this one compiles and kind of works... Actaully I've been stuffing around with shutting the server down from the client, but I can't figure the non-blocking I/O which would be required to go into an interuptable waiting-for-input state... I did find Apache MINA though I kinda got side tracked....

So, Without any further rambling, digression, or other untoward and unhelpful side trips into MY problems... Here are the fabled codez.

MultiEchoClient

//http://java.sun.com/docs/books/tutorial/networking/sockets/index.html

package tutorials.sun.networking.sockets;

import java.io.PrintWriter;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.IOException;

import java.net.Socket;

import java.net.UnknownHostException;

import java.net.ConnectException;

public class MultiEchoClient

{

private static final String HOST_NAME = "localhost";

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

BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));

Socket socket = null;

PrintWriter sockout = null;

BufferedReader sockin = null;

try {

// create a client socket

socket = new Socket(HOST_NAME, MultiEchoServer.PORT_NUMBER);

// hook the sockets input & output streams

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

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

// read & display the servers welcome message

System.out.println(sockin.readLine());

// send whatever the user enters to the server, which echo's it back,

// and we just display it back to the client (reversed)

String message;

while ((message = stdin.readLine()) != null) {

sockout.println(message);

String response = sockin.readLine();

if(response==null) break; //server has died

System.out.println("< " + response);

}

} catch (UnknownHostException e) {

System.err.println(e + " - hostname="+HOST_NAME+", port="+EchoServer.PORT_NUMBER);

} catch (ConnectException e) {

System.err.println(e + " - hostname="+HOST_NAME+", port="+EchoServer.PORT_NUMBER);

} catch (IOException e) {

System.err.println(e);

} finally {

try {if(sockout!=null)sockout.close();} catch (Exception ignore) {}

try {if(sockin!=null)sockin.close();} catch (Exception ignore) {}

try {if(socket!=null)socket.close();} catch (Exception ignore) {}

try {if(stdin!=null)stdin.close();} catch (Exception ignore) {}

}

}

}

MultiEchoServer

//http://java.sun.com/docs/books/tutorial/networking/sockets/index.html

package tutorials.sun.networking.sockets;

/*

cd /d C:\Java\home\src\forums\chat

java -cp c:\java\home\classes tutorials.sun.networking.sockets.MultiEchoClient

*/

import java.io.PrintWriter;

import java.io.InputStreamReader;

import java.io.BufferedReader;

import java.io.IOException;

import java.net.Socket;

import java.net.ServerSocket;

/**

* handles each requests from a client socket

*/

class SocketHandler extends Thread

{

private static final boolean AUTOFLUSH = true;

private static int id = 1;

private Socket socket = null;

private PrintWriter sockout = null;

private BufferedReader sockin = null;

SocketHandler(Socket socket) {

this.socket = socket;

}

public void run() {

try {

sockout = new PrintWriter(socket.getOutputStream(), AUTOFLUSH);

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

// send a greeting message

int myid = id++;

sockout.println("Connected to MultiEchoServer.SocketHandler number="+myid+", threadId="+this.getId());

// now echo requests from the client back to the client.

String request = null;

while ((request = sockin.readLine()) != null) {

System.out.println(myid+"< "+request);

if ("bye".equals(request)) {

break;

}

if ("shutdown".equals(request)) {

MultiEchoServer.shutdown();

break;

}

String response = request;

System.out.println(myid+"> "+response);

sockout.println(response);

}

System.out.println("end of try");

} catch (Exception e) {

System.out.println("exception");

System.err.println(e);

} finally {

System.out.println("finally");

try {if(sockout!=null)sockout.close();} catch (Exception ignore) {}

try {if(sockin!=null)sockin.close();} catch (Exception ignore) {}

try {if(socket!=null)socket.close();} catch (Exception ignore) {}

System.out.println("end of finally");

}

System.out.println("end of run method");

}

}

public class MultiEchoServer

{

public static final int PORT_NUMBER = 4448;

private static volatile boolean listening = true;

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

ServerSocket serverSocket = null;

Socket socket = null;

PrintWriter sockout = null;

BufferedReader sockin = null;

// create a "socket factory"

try {

serverSocket = new ServerSocket(PORT_NUMBER);

} catch (IOException e) {

System.err.println(e+" - new ServerSocket("+PORT_NUMBER+") failed.");

System.exit(1);

}

// create a client listener socket for each connect request.

try {

do {

new SocketHandler(serverSocket.accept()).start();

} while(listening);

System.err.println("Shutting down");

} catch (IOException e) {

System.err.println(e+" - serverSocket.accept() failed.");

} finally {

try {if(serverSocket!=null)serverSocket.close();} catch (Exception ignore) {}

}

}

public static void shutdown() {

listening = false;

}

}

Why Sun confused localhost with some ancient greek poofta I'll never know.

Keith.

corlettka at 2007-7-12 19:41:50 >