client.java

java Sockets using UDP

import java.net.*;

import java.io.*;
public class client{
static final int port = 3500;
public static void main(String argv[]) throws SocketException,IOException
{

BufferedReader entree= new BufferedReader(new InputStreamReader(System.in));
String ligne=entree.readLine();
int longueur = ligne.length();
byte[] message = new byte[longueur];
InetAddress adresse=null;
DatagramSocket socket;
try
{
if(argv.length>0)
adresse=InetAddress.getByName(argv[0]);
else
adresse=InetAddress.getLocalHost();

}
catch(UnknownHostException e)
{
System.out.println("destinataire inconnu");
}
message=ligne.getBytes();
DatagramPacket envoi= new DatagramPacket(message,longueur,adresse,port);
socket=new DatagramSocket();
socket.send(envoi);


byte[] memoire = new byte[100];
String text;
DatagramPacket reception = new DatagramPacket(memoire,memoire.length);
socket.receive(reception);
text=new String (memoire);
System.out.println("Reception de la machine " + reception.getAddress().getHostName() + "sur le port " + reception.getPort()+":\n"+text);




}
}