[Ch15] Client updated. Probably works. Hard to tell when the server doesn't.

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;

import java.net.InetSocketAddress;

import java.nio.ByteBuffer;

import java.nio.channels.SocketChannel;

public class SimpleChatClient {

  private JTextArea incoming;

  private JTextField outgoing;

  private BufferedReader reader;

  private PrintWriter writer;

  private SocketChannel socketChannel;

  public static void main(String[] args) {

    new SimpleChatClient().go();

  private void setUpNetworking() {

    try {

      Socket socket = new Socket("127.0.0.1", 5000);

      InputStreamReader streamReader = new InputStreamReader(socket.getInputStream());

      reader = new BufferedReader(streamReader);

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

      InetSocketAddress address = new InetSocketAddress("localhost", 5000);

      this.socketChannel = SocketChannel.open(address);

      System.out.println("networking established");

    } catch (IOException ex) {

      ex.printStackTrace();

  public class SendButtonListener implements ActionListener {

    public void actionPerformed(ActionEvent ev) {

      try {

        writer.println(outgoing.getText());

        writer.flush();

        String message = outgoing.getText();

        System.out.println(message);

        ByteBuffer buffer = ByteBuffer.wrap(message.getBytes());

        socketChannel.write(buffer);

      } catch (Exception ex) {

        ex.printStackTrace();

      }

  public class IncomingReader implements Runnable {

    public void run() {

      String message;

      ByteBuffer buffer = ByteBuffer.allocate(256);

      try {

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

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

          incoming.append(message + "\n");

        } // close while

      } catch (Exception ex) {

        ex.printStackTrace();

        socketChannel.read(buffer);

      } catch (IOException e) {

        e.printStackTrace();

      }

      String result = new String(buffer.array()).trim();

      incoming.append(result);

    } // close run

  } // close inner class

} // close outer class

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