JavaExercises/Head First Java/SimpleChatClient.java at master · biblelamp/JavaExercises · GitHub

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import java.io.*;

import java.net.*;

//import java.util.*;

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class SimpleChatClient {

JTextArea incoming;

JTextField outgoing;

BufferedReader reader;

PrintWriter writer;

Socket sock;

public static void main(String[] args) {

SimpleChatClient client = new SimpleChatClient();

client.go();

}

public void go() {

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

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JPanel mainPanel = new JPanel();

incoming = new JTextArea(25, 40);

incoming.setLineWrap(true);

incoming.setWrapStyleWord(true);

incoming.setEditable(false);

JScrollPane qScroller = new JScrollPane(incoming);

qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);

qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);

outgoing = new JTextField(33);

outgoing.addActionListener(new SendButtonListener());

JButton sendButton = new JButton("Send");

sendButton.addActionListener(new SendButtonListener());

mainPanel.add(qScroller);

mainPanel.add(outgoing);

mainPanel.add(sendButton);

setUpNetworking();

Thread readerThread = new Thread(new IncomingReader());

readerThread.start();

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

frame.setBounds(200, 200, 470, 475);

frame.setVisible(true);

}

private void setUpNetworking() {

try {

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

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

reader = new BufferedReader(streamReader);

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

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

} catch(Exception ex) { ex.printStackTrace(); }

}

public class SendButtonListener implements ActionListener {

public void actionPerformed(ActionEvent ev) {

try {

writer.println(outgoing.getText());

writer.flush();

} catch(Exception ex) { ex.printStackTrace(); }

outgoing.setText("");

outgoing.requestFocus();

}

public class IncomingReader implements Runnable {

public void run() {

String message;

try {

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

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

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

}

} catch(Exception ex) { ex.printStackTrace(); }

}

JavaExercises/Head First Java/SimpleChatClient.java at master · biblelamp/JavaExercises · GitHub

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