Outubro 2008
Prof. Ismael H. F. Santos
- ismael@tecgraf.puc-rio.br
2
UDP client
sends a message to the server and
gets a reply
import java.net.*;
import java.io.*;
public
class UDPClient{
public static void main(String args[]){
// args give message contents and
server hostname
DatagramSocket aSocket = null;
try {
aSocket = new DatagramSocket();
byte [] m =
args[0].getBytes();
InetAddress aHost =
InetAddress.getByName(args[1]);
int serverPort = 6789;
DatagramPacket request = new
DatagramPacket(m, args[0].length(),
aHost, serverPort);
aSocket.send(request);
byte[] buffer = new
byte[1000];
DatagramPacket reply = new
DatagramPacket(buffer, buffer.length);
aSocket.receive(reply);
System.out.println("Reply: " + new String(reply.getData()));
}catch (SocketException
e){System.out.println("Socket: " + e.getMessage());
}catch
(IOException e){System.out.println("IO: " + e.getMessage());}
}finally {if(aSocket != null)
aSocket.close();} }
}