New to Java

Here's my Java server program, wich expects a cliente to be connected with it. The question is, using command line can I connect to this server program using telnet? If I do, what's the command I must use to do so?

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

public class Server {

   public static void main(String args[]) {
   
      try {
         ServerSocket serverSocket = new ServerSocket(4433);
         Socket socket = null;
   
         while(true) {
            System.out.print("Waiting connection...");
            socket = serverSocket.accept();
            System.out.println("Connected!");
            BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            PrintStream output = new PrintStream(socket.getOutputStream());
            String line = input.readLine();
            
            while(line != null && ! line.trim().equals("")) {
               output.println("You have sent me: " + line);
               line = input.readLine();
            }
            socket.close();
         }
      }
      catch(IOException ioe) {
          System.out.println(ioe);
      }
 
   }

}