Java 7 new features - 8. NIO2 : F. Review - Traditional TCP server/client example

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After we learnt how the NIO2 works, let's review the traditional socket programming
Traditional TCP Server

 
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class TraditionalTcpSocketServer
{
    public static void main(String[] argv)
        throws Exception
    {
        String clientSentence;
        ServerSocket welcomeSocket = new ServerSocket(9001);
        while (true)
        {
            Socket connectionSocket = welcomeSocket.accept();
            BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
            DataOutputStream outToClient = new DataOutputStream(connectionSocket.getOutputStream());
            clientSentence = inFromClient.readLine();
            System.out.println("FROM CLIENT: " + clientSentence);
            outToClient.writeBytes("World" + System.getProperty("line.separator"));
        }
    }
}

Traditional TCP Client

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.Socket;

public class TraditionalTcpSocketClient
{
    public static void main(String[] argv)
        throws Exception
    {
        String sentence = "Hello";
        String modifiedSentence;
        Socket clientSocket = new Socket("localhost", 9001);
        DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
        BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
        outToServer.writeBytes(sentence + System.getProperty("line.separator"));
        modifiedSentence = inFromServer.readLine();
        System.out.println("FROM SERVER: " + modifiedSentence);
        clientSocket.close();
    }
}