[Ch15] Updated SimpleChatClientA - formatting, updated IO, plus formatting for the book.

package ch15;

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.IOException;

import java.io.PrintWriter;

import java.net.Socket;

import java.awt.BorderLayout;

import java.awt.event.*;

import java.io.*;

import java.net.InetSocketAddress;

import java.nio.channels.*;

import static java.nio.charset.StandardCharsets.UTF_8;

public class SimpleChatClientA {

  JTextField outgoing;

  PrintWriter writer;

  Socket sock;

  private JTextField outgoing;

  private PrintWriter writer;

  public void go() {

    JFrame frame = new JFrame("Ludicrously Simple Chat Client");

    JPanel mainPanel = new JPanel();

    setUpNetworking();

    outgoing = new JTextField(20);

    JButton sendButton = new JButton("Send");

    sendButton.addActionListener(new SendButtonListener());

    JPanel mainPanel = new JPanel();

    mainPanel.add(outgoing);

    mainPanel.add(sendButton);

    JFrame frame = new JFrame("Ludicrously Simple Chat Client");

    frame.getContentPane().add(BorderLayout.CENTER, mainPanel);

    setUpNetworking();

    frame.setSize(400, 500);

    frame.setSize(400, 100);

    frame.setVisible(true);

  } // close go

  }

  private void setUpNetworking() {

    try {

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

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

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

    InetSocketAddress serverAddress = new InetSocketAddress("127.0.0.1", 5000);

    try (SocketChannel socketChannel = SocketChannel.open(serverAddress)) {

      writer = new PrintWriter(Channels.newWriter(socketChannel, UTF_8));

      System.out.println("Networking established. Client running at: " + socketChannel.getLocalAddress());

    } catch (IOException ex) {

      ex.printStackTrace();

    }

  } // close setUpNetworking

  }

  public class SendButtonListener implements ActionListener {

    public void actionPerformed(ActionEvent ev) {

      outgoing.setText("");

      outgoing.requestFocus();

    }

  } // close SendButtonListener inner class

  }

  public static void main(String[] args) {

    new SimpleChatClientA().go();

  }

} // close outer class

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}

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