UDP echo application from console client-server implemenation in Java

EchoReceive.java

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

public class EchoReceive {
	// Server
    public static void main(String[] args) {
        try {
            DatagramSocket s = new DatagramSocket(1234); // port 1234
            System.out.println("Waiting for datagrams");
            for (;;) {
                DatagramPacket p = new DatagramPacket(new byte[65535], 65535); // 65535: Max. space for a datagram
                s.receive(p); // Receiving the datagram
                System.out.println("Datagram received from: " + p.getAddress() + " with port: " + p.getPort());
                byte[] b = p.getData(); // Storing received bytes in an byte array for later convertion to String
                
                // b: Where are we taking the bytes from
                // 0: From which position are we starting to read the bytes
                // p.getLength(): How many bytes are we reading
                String data = new String(b, 0, p.getLength()); 

                // We send back the datagram we just received to the sender
                DatagramPacket p1 = new DatagramPacket(b, p.getLength(), p.getAddress(), p.getPort());
            	s.send(p1);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

EchoSend.java

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

public class EchoSend {
	
	//Client

    public static void main(String[] args) {
        String host = "127.0.0.1";
        int port = 1234;
        InetAddress dst = null; // Where are we sending the datagrams to
        try {
            dst = InetAddress.getByName(host);
        } catch (UnknownHostException e) {
            System.err.println("Non valid address");
            System.exit(1);
        }
        try {
            for (;;) {
                BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); // System.in = console
                System.out.println("Write your message: ");
                String msj = br.readLine(); // Getting message from console
                
                DatagramSocket cl = new DatagramSocket();
                byte[] b = msj.getBytes(); // String to bytes for sending it in a DatagramPacket
                DatagramPacket p = new DatagramPacket(b, b.length, dst, port); // Creating the datagram to send
                cl.send(p); // Sending the datagram

                // We are going to receive back the datagram we just sent
                DatagramPacket p1 = new DatagramPacket(new byte[65535], 65535); // Creating a new datagram where we receive the echo (the above sent datagram)
                cl.receive(p1);
                System.out.println("Datagram received from: " + p.getAddress() + " with port: " + p.getPort());
                byte[] b2 = p1.getData(); // Storing received bytes in an byte array for later convertion to String

                // b2: Where are we taking the bytes from
                // 0: From which position are we starting to read the bytes
                // p1.getLength(): How many bytes are we reading
                String data = new String(b2, 0, p1.getLength());

                // Printing the received echo
                System.out.println(data);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}