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

class OTPClient {
public static void main(String args[]) throws IOException {
Scanner scan = new Scanner(System.in);
System.out.println(“Connecting to the server…”);
Socket clientSocket = new Socket(“localhost”, 7777);
PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));

// Client enters ID. This will be used by the program for verifying who
// is communicating as well as check the OTP against the ID, on the
// server side
System.out.println(“Enter your ID:”);
String id = scan.nextLine();
System.out.println(“Contacting server…”);
out.println(id);
System.out.println(“Server has sent the OTP. Please enter it here:”);
String otp = scan.nextLine();
System.out.println(“Verifying…”);
out.println(id);
out.println(otp);
System.out.println(in.readLine());

in.close();
out.close();
clientSocket.close();
}
}

/*

Output:
Connecting to the server…
Enter your ID:
manav
Contacting server…
Server has sent the OTP. Please enter it here:
02489572
Verifying…
Logged In!

*/