Help with client server chat 1

Question

Hi,
I have to create small multithreaded client/server. chat program. Server and client have to exchange messages using input boxes until user types QUIT. I did most of it(I think) but it seems that server does not receives client messages and input boxes are displayed only once. I can�t figure out what is the problem. Here is what I did .I know it�s not easy to understand somebody else�s code, but if anybody have some spare time?
this is just a server part, client is in second posting
SERVER.JAVA
import java.io.*;
import java.net.*;
import java.lang.*;
import javax.swing.*;
public class Server
final int SBAP_PORT = 5555;
//constructor
public Server(){
//set up server socket
ServerSocket ss = null;
try {
ss = new ServerSocket(SBAP_PORT);
} //end try
catch (Exception e) {
System.out.println("Could not create socket: Exception " + e);
System.exit(0);
} //end catch
//chat with the client until user break the connection or enters QUIT
try {
while(true) {
System.out.println("Server: Waiting for client to connect ...");
Socket currentSocket = ss.accept();
//create a new thread for each connection
new ServerThread(currentSocket);
} //end while
} //end try
catch (Exception e) {
System.out.println("Fatal server error: " + e);
}//end catch
}//end constructor
//inner class ServerThread to handle individual client connections
private class ServerThread extends Thread {
private Socket sock;
private InputStream in=null;
private OutputStream out=null;
private BufferedReader reader = null;
private PrintWriter writer = null;
//constructor
public ServerThread(Socket sock) {
try{
this.sock=sock;
System.out.println("Server: Client connection established");
start();
}//end try
catch (Exception e){}
}//end constructor
public void run() {
try{
in = this.sock.getInputStream();
out =this.sock.getOutputStream();
reader = new BufferedReader(new InputStreamReader(in));
writer = new PrintWriter(out);
while(true) {
String server_response = JOptionPane.showInputDialog(null,"Server Response");
System.out.println("Sending: " + server_response);
writer.println(server_response);
writer.flush();
String line = reader.readLine(); //receives client request
if (line == null || line.equals("QUIT"))
System.out.println("No data received");
else
System.out.println("Received: " + line);
}//end while
}//end try
catch (Exception e) {
System.out.println("Connection to current client lost.");
finally {
try {
sock.close();
}//end try
catch (Exception e) {}
}//end finally
}//end run
}//end inner class ServerThread
//main starts
public static void main(String[] args) {
new Server();
}//end main()
}//end class Server

Answer 1

http://forum.java.sun.com/thread.jspa?threadID=574466&messageID=2861516#2861516