ChatServeThread

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

//import java.util.*;


public class ChatServeThread extends Thread
{

    ServerSocket serverSocket = null;
    Socket clientSocket = null;
    PrintWriter clientOut = null;
    BufferedReader clientIn = null;


    public ChatServeThread() throws IOException
    {
        this("ChatServeThread");
    }

    public ChatServeThread(String name) throws IOException
    {
        super(name);        //creates a thread with the same name
                              //do not use 0-1023 aka known ports
        serverSocket = new ServerSocket(4444);

    }


    public void run()
    {
        //the server accepts the client's request to logon
        try{
            clientSocket = serverSocket.accept();
        }catch (IOException e){
            System.err.println("clientSocket not accepted");
            System.exit(1);
        }

        try{
            clientOut = new PrintWriter(clientSocket.getOutputStream(), true);
            clientIn = new BufferedReader(
                new InputStreamReader(  clientSocket.getInputStream()  )
                                           );

        } catch (IOException e) {
            System.err.println("couldn't get I/O from clientSocket");
            System.exit(1);
        }

try {
        String inputLine, outputLine;


        ChatPt3 cp = new ChatPt3();     //the chat protocol

        outputLine = cp.processInput(null);
        clientOut.println(outputLine);

        while ((inputLine = clientIn.readLine()) != null) {
             outputLine = cp.processInput(inputLine);
             clientOut.println(outputLine);
             if (outputLine.equals("Bye."))
                break;
        }

        clientOut.close();
        clientIn.close();
        clientSocket.close();
        serverSocket.close();

    } catch (IOException e) {
            System.err.println("I/O problems");
            System.exit(1);
        }

    }

}//class close brace