/*
  *	A a server that takes a string from the client and returned in upper case is discussed. 
  *	Hope this will give an overall picture about how socket programming work.
  *	Available at : http://www.tutebox.com
  *	Thank you for following Tutebox.
  */

import java.io.*; 
import java.net.*; 
class TCPServer { 
  public static void main(String argv[]) throws Exception { 
      String clientSentence; 
      String capitalizedSentence; 
      ServerSocket welcomeSocket = new ServerSocket(6789); 
     while(true) { 
           Socket connectionSocket = welcomeSocket.accept(); 
           BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream())); 
           DataOutputStream  outToClient = new DataOutputStream(connectionSocket.getOutputStream()); 
		   System.out.println("Server waiting for data...");  
           clientSentence = inFromClient.readLine(); 
           System.out.println("Recived from client : " + clientSentence);  
           capitalizedSentence = clientSentence.toUpperCase() + '\n'; 
           outToClient.writeBytes(capitalizedSentence); 
        } 
    } 
}