import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class SimpleChatClient {
	JTextArea incoming;
	JTextField outgoing;
	BufferedReader reader;
	PrintWriter writer;
	Socket sock;
	
	
	public static void main(String[] args) {
		SimpleChatClient scc = new SimpleChatClient();
		scc.go();
	}
	public void go(){
		JFrame frame = new JFrame("Dav1d Chat Client");
		JPanel mainPanel = new JPanel();
		
		incoming = new JTextArea(15,50);
		incoming.setLineWrap(true);
		incoming.setWrapStyleWord(true);
		incoming.setEditable(true);
		incoming.setText("Welcome to Dav1d Chat Client");
		
		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);
		
		setUpNetworking();
		
		Thread readerThread = new Thread(new IncomingReader());
		readerThread.start();
		
		frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
		frame.setSize(600,450);
		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 Complete");
		}catch(Exception ex){ex.printStackTrace();}
	}
		
	public class SendButtonListener implements ActionListener{
		public void actionPerformed(ActionEvent ae){
			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)
				{
					//incoming.append("\n" + message);
					incoming.setText(incoming.getText() + "\n" + message);
					System.out.println("Read " + message);
				}
			}catch(Exception ex){ex.printStackTrace();}
		}
	}
}


import java.io.*;
import java.net.*;
import java.util.*;

public class SimpleChatServer {
	ArrayList clientOutputStreams;
	
	public class ClientHandler implements Runnable
	{
		BufferedReader br;
		Socket sock;
		
		public ClientHandler(Socket cSock)
		{
			try{
				sock = cSock;
				InputStreamReader isr = new InputStreamReader(sock.getInputStream());
				br = new BufferedReader(isr);
			}catch (Exception ex){ex.printStackTrace();}
		}
		
		public void run()
		{
			String message;
			try{
				while((message=br.readLine())!=null)
				{
					System.out.println("Read " + message);
					sendAll(message);
				}
			}catch(Exception ex){ex.printStackTrace();}
		}
	}
	
	public static void main(String[] args) {
		new SimpleChatServer().go();
	}
	
	public void go(){
		clientOutputStreams = new ArrayList();
		try{
			ServerSocket sSock = new ServerSocket(5000);
			
			while(true)
			{
				Socket cSock = sSock.accept();
				PrintWriter writer = new PrintWriter(cSock.getOutputStream());
				clientOutputStreams.add(writer);
				
				Thread t = new Thread(new ClientHandler(cSock));
				t.start();
				System.out.println("Connection Acquired");
			}
		}catch(Exception ex){ex.printStackTrace();}
	}
	
	public void sendAll(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();}
	}
}