SIMPLE CHAT CLIENT 28-04-2009
import java.io.*;
import java.net.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;


public class SimpleChatClient
{
JTextArea incoming;
JTextField outgoing;
BufferedReader reader;
PrintWriter writer;
Socket sock;

public void go() {
JFrame frame = new JFrame("Ludicrously Simple Chat Client");
JPanel mainPanel = new JPanel();
incoming = new JTextArea(15, 50);
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_ALWAYS);
outgoing = new JTextField(20);
JButton sendButton = new JButton("Send");
sendButton.addActionListener(new SendButtonListener());
mainPanel.add(qScroller);
mainPanel.add(outgoing);
mainPanel.add(sendButton);
frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
setUpNetworking();

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

frame.setSize(650, 500);
frame.setVisible(true);

}

private void setUpNetworking() {
try {
sock = new Socket("192.168.3.25", 5000);
InputStreamReader streamReader = new InputStreamReader(sock.getInputStream());
reader = new BufferedReader(streamReader);
writer = new PrintWriter(sock.getOutputStream());
System.out.println("networking established");
}
catch(IOException ex)
{
ex.printStackTrace();
}
}

public class SendButtonListener implements ActionListener {
public void actionPerformed(ActionEvent ev) {
try {
writer.println(sock.getLocalAddress().getHostAddress()+" : "+outgoing.getText());
writer.flush();

}
catch (Exception ex) {
ex.printStackTrace();
}
outgoing.setText("");
outgoing.requestFocus();
}
}

public static void main(String[] args) {
new SimpleChatClient().go();
}

class IncomingReader implements Runnable {
public void run() {
String message;
try {
while ((message = reader.readLine()) != null) {
System.out.println("client read " + message);
incoming.append(message + "\n");
}
} catch (IOException ex)
{
ex.printStackTrace();
}
}
}
}

CLIENTE.JAVA 27-04-2009
import java.io.*;
import java.net.*;
public class Cliente{
String sentence;
String modifiedSentence;
Socket s;
BufferedReader inFromUser;
DataOutputStream outToServer;
BufferedReader inFromServer;
public Cliente (){
try{
s=new Socket("192.168.3.25",60000);
inFromUser=new BufferedReader(new InputStreamReader(System.in));
outToServer=new DataOutputStream(s.getOutputStream());
inFromServer=new BufferedReader(new InputStreamReader(s.getInputStream()));
sentence= inFromUser.readLine();
outToServer.writeBytes(sentence + '\n');
modifiedSentence= inFromServer.readLine();
System.out.println(modifiedSentence);
} catch (IOException ex){
ex.printStackTrace();
}
}
public static void main(String[] args){
Cliente c=new Cliente();
}
}