Multithreaded simple client/server chat console program

SERVER---

import java.io.*;
import java.net.*;
import java.lang.*;

public class Server {

	public static void main(String[] args) throws IOException {
		final int port = 444;
		System.out.println("Server waiting for connection on port "+port);
		ServerSocket ss = new ServerSocket(port);
		Socket clientSocket = ss.accept();
		System.out.println("Recieved connection from "+clientSocket.getInetAddress()+" on port "+clientSocket.getPort());
		//create two threads to send and recieve from client
		RecieveFromClientThread recieve = new RecieveFromClientThread(clientSocket);
		Thread thread = new Thread(recieve);
		thread.start();

		SendToClientThread send = new SendToClientThread(clientSocket);
		Thread thread2 = new Thread(send);
		thread2.start();
	}}

class RecieveFromClientThread implements Runnable
{
	Socket clientSocket=null;
	BufferedReader brBufferedReader = null;
	
	public RecieveFromClientThread(Socket clientSocket)
	{
		this.clientSocket = clientSocket;
	}//end constructor
	public void run() {
		try{
		brBufferedReader = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));		
		
		String messageString;
		while(true){
		while((messageString = brBufferedReader.readLine())!= null){//assign message from client to messageString
			if(messageString.equals("EXIT"))
			{
				break;//break to close socket if EXIT
			}
			System.out.println("From Client: " + messageString);//print the message from client
			System.out.println("Please enter something to send back to client..");
		}
		this.clientSocket.close();
		System.exit(0);
	}
		
	}
	catch(Exception ex){System.out.println(ex.getMessage());}
	}
}//end class RecieveFromClientThread

class SendToClientThread implements Runnable
{
	PrintWriter pwPrintWriter;
	Socket clientSock = null;
	
	public SendToClientThread(Socket clientSock)
	{
		this.clientSock = clientSock;
	}
	public void run() {
		try{
		pwPrintWriter =new PrintWriter(new OutputStreamWriter(this.clientSock.getOutputStream()));//get outputstream
		
		while(true)
		{
			String msgToClientString = null;
			BufferedReader input = new BufferedReader(new InputStreamReader(System.in));//get userinput
			
			msgToClientString = input.readLine();//get message to send to client
			
			pwPrintWriter.println(msgToClientString);//send message to client with PrintWriter
			pwPrintWriter.flush();//flush the PrintWriter
			System.out.println("Please enter something to send back to client..");
		}//end while
		}
		catch(Exception ex){System.out.println(ex.getMessage());}	
	}//end run
}//end class SendToClientThread


CLIENT ---


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

public class Client {
	public static void main(String[] args)
	{
		try {
			Socket sock = new Socket("localhost",444);
			SendThread sendThread = new SendThread(sock);
			Thread thread = new Thread(sendThread);thread.start();
			RecieveThread recieveThread = new RecieveThread(sock);
			Thread thread2 =new Thread(recieveThread);thread2.start();
		} catch (Exception e) {System.out.println(e.getMessage());} 
	}
}
class RecieveThread implements Runnable
{
	Socket sock=null;
	BufferedReader recieve=null;
	
	public RecieveThread(Socket sock) {
		this.sock = sock;
	}//end constructor
	public void run() {
		try{
		recieve = new BufferedReader(new InputStreamReader(this.sock.getInputStream()));//get inputstream
		String msgRecieved = null;
		while((msgRecieved = recieve.readLine())!= null)
		{
			System.out.println("From Server: " + msgRecieved);
			System.out.println("Please enter something to send to server..");
		}
		}catch(Exception e){System.out.println(e.getMessage());}
	}//end run
}//end class recievethread

class SendThread implements Runnable
{
	Socket sock=null;
	PrintWriter print=null;
	BufferedReader brinput=null;
	
	public SendThread(Socket sock)
	{
		this.sock = sock;
	}//end constructor
	public void run(){
		try{
		if(sock.isConnected())
		{
			System.out.println("Client connected to "+sock.getInetAddress() + " on port "+sock.getPort());
			this.print = new PrintWriter(sock.getOutputStream(), true);	
		while(true){
			System.out.println("Type your message to send to server..type 'EXIT' to exit");
			brinput = new BufferedReader(new InputStreamReader(System.in));
			String msgtoServerString=null;
			msgtoServerString = brinput.readLine();
			this.print.println(msgtoServerString);
			this.print.flush();
		
			if(msgtoServerString.equals("EXIT"))
			break;
			}//end while
		sock.close();}}catch(Exception e){System.out.println(e.getMessage());}
	}//end run method
}//end class