mylab

aula01TServidor

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


//destinatário, receptor
public class Servidor {
    public static void main (String args[]) {
        try {
            System.out.println("Binding to local port 2000");

            // CREATE A DATAGRAM SOCKET, BOUND TO THE SPECIFIC PORT 2000
            DatagramSocket socket = new DatagramSocket(2000);

            // CREATE A DATAGRAM PACKET WITH A MAXIMUM BUFFER OF 256 BYTES
            DatagramPacket packet = new DatagramPacket(new byte[256], 256);

            // RECEIVE A PACKET (BY DEFAULT, THIS IS A BLOCKING OPERATION)
            socket.receive(packet);

            // DISPLAY PACKET INFORMATION
            InetAddress remote_addr = packet.getAddress();
            System.out.println("Sent by: " + remote_addr.getHostAddress());
            System.out.println("Sent from port: " + packet.getPort());
            //apenas os bytes que foram copiados packet.getData()
            String msg = new String(packet.getData(), 0, packet.getLength());
            System.out.println(msg);

            socket.close();
        } catch (IOException e) {
            System.err.println("Error - " + e);
        }
    }}