Main.java Source code

Introduction

Here is the source code for Main.java

Source

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

public class Main {
    public static void main(String[] args) throws Exception {
        final int LOCAL_PORT = 12345;
        final String SERVER_NAME = "localhost";
        DatagramSocket udpSocket = new DatagramSocket(LOCAL_PORT, InetAddress.getByName(SERVER_NAME));

        System.out.println("Created UDP  server socket at " + udpSocket.getLocalSocketAddress() + "...");
        while (true) {
            System.out.println("Waiting for a  UDP  packet...");
            DatagramPacket packet = new DatagramPacket(new byte[1024], 1024);
            udpSocket.receive(packet);
            displayPacketDetails(packet);
            udpSocket.send(packet);
        }
    }

    public static void displayPacketDetails(DatagramPacket packet) {
        byte[] msgBuffer = packet.getData();
        int length = packet.getLength();
        int offset = packet.getOffset();

        int remotePort = packet.getPort();
        InetAddress remoteAddr = packet.getAddress();
        String msg = new String(msgBuffer, offset, length);

        System.out.println(
                "Received a  packet:[IP Address=" + remoteAddr + ", port=" + remotePort + ", message=" + msg + "]");
    }
}