UDPServer (2).java

import java.net.*;

public class UDPServer {
    public static void main(String[] args) {
        final int PORT = 9876;

        try (DatagramSocket serverSocket = new DatagramSocket(PORT)) {
            System.out.println("Server is listening on port " + PORT);

            while (true) {
                byte[] receiveData = new byte[1024];
                DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
                serverSocket.receive(receivePacket);

                String message = new String(receivePacket.getData(), 0, receivePacket.getLength());
                System.out.println("Received from client: " + message);

                String response = "Server says: Hello, " + message;
                byte[] sendData = response.getBytes();
                DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, receivePacket.getAddress(), receivePacket.getPort());
                serverSocket.send(sendPacket);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}