Notes

import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.Scanner;

/**
* UDP Client for sending message
*/
public class UDPClient4
{
public static void main(String args[])
{
try
{
String server_address = "localhost";
int server_port = 1111;
Scanner input = new Scanner(System.in);
System.out.println("Enter the message to be sent");
String message = input.nextLine();

InetAddress address = InetAddress.getByName(server_address);

// Create Datagram packet with the UDP Server Ipaddress/ Port and Message to be sent
DatagramPacket packet = new DatagramPacket(message.getBytes(), message.getBytes().length, address, server_port);

// Create DatagramSocket socket and send the Message
DatagramSocket socket = new DatagramSocket();
socket.send(packet);
System.out.println("UDPClient: Sent data to Server ; Message = " + message);
socket.close();
}
catch (Exception e)
{
e.printStackTrace();
System.out.println("Error in sending the Data to UDP Server");
}
}
}