take this

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

//
// This is an implementation of a simplified version of a command
// line ftp client. The program always takes two arguments
//


public class CSftp {

    public static void main(String [] args) {

	// Get command line arguments and connected to FTP
	// If the arguments are invalid or there aren't enough of them
        // then exit.

	if (!(args.length == 2 || args.length == 1)) {
	    System.out.print("Usage: cmd ServerAddress ServerPort\n");
	    return;
	}

  	int portNumber = 21;
  	String hostName = args[0];

  	if (args.length == 2){
    	portNumber = Integer.parseInt(args[1]);
  	}

	try
		// (Socket ftpSocket = new Socket(hostName, portNumber);
	 //    PrintWriter out = new PrintWriter(ftpSocket.getOutputStream(), true);
	 //    BufferedReader in = new BufferedReader(
  //    		new InputStreamReader(ftpSocket.getInputStream())); )
	{
        BufferedReader stdIn =
            new BufferedReader(new InputStreamReader(System.in));
        String fromServer;
        String fromUser;

       	System.out.println("Welcome! Please state user:");

	    while (true) {
			System.out.print("csftp> ");
			// Start processing the command here.
			fromUser = stdIn.readLine();
			if (fromUser!= null) {
				String[] splited = fromUser.split("\\s+");
				switch (splited[0]) {
					case "user":
						//out.println("USER user");
						break;
					case "pw":
						System.out.print("U WOT\n");
						break;
					case "quit":
						System.out.print("M8\n");
						break;
					case "get":
						System.out.print("dat\n");
						break;
					case "features":
						System.out.print("aint\n");
						break;
					case "cd":
						System.out.print("falco\n");
						break;
					case "dir":
						System.out.print("WHERE U AT\n");
						break;
					default:
						System.out.println("900 Invalid command.");
				}

			}
	    }

	} catch (UnknownHostException e){
    	System.err.println("Don't know about host " + hostName);
    	System.exit(1);
  	} catch (IOException exception) {
	    System.err.println("998 Input error while reading commands, terminating.");
	}
 	}
}