[Ch15] 2nd Ed ready baked code chat client

package ch15;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;

import java.util.ArrayList;

import java.util.Iterator;

public class VerySimpleChatServer {

  ArrayList clientOutputStreams;

  public class ClientHandler implements Runnable {

    BufferedReader reader;

    Socket sock;

    public ClientHandler(Socket clientSocket) {

      try {

        sock = clientSocket;

        InputStreamReader isReader = new InputStreamReader(sock.getInputStream());

        reader = new BufferedReader(isReader);

      } catch (Exception ex) {

        ex.printStackTrace();

      }

    } // close constructor

    public void run() {

      String message;

      try {

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

          System.out.println("read " + message);

          tellEveryone(message);

        } // close while

      } catch (Exception ex) {

        ex.printStackTrace();

      }

    } // close run

  } // close inner class

  public static void main(String[] args) {

    new VerySimpleChatServer().go();

  }

  public void go() {

    clientOutputStreams = new ArrayList<PrintWriter>();

    try {

      ServerSocket serverSock = new ServerSocket(5000);

      while (true) {

        Socket clientSocket = serverSock.accept();

        PrintWriter writer = new PrintWriter(clientSocket.getOutputStream());

        clientOutputStreams.add(writer);

        Thread t = new Thread(new ClientHandler(clientSocket));

        t.start();

        System.out.println("got a connection");

      }

    } catch (Exception ex) {

      ex.printStackTrace();

    }

  } // close go

  public void tellEveryone(String message) {

    Iterator it = clientOutputStreams.iterator();

    while (it.hasNext()) {

      try {

        PrintWriter writer = (PrintWriter) it.next();

        writer.println(message);

        writer.flush();

      } catch (Exception ex) {

        ex.printStackTrace();

      }

    } // end while

  } // close tellEveryone

} // close class

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