Network Clients - Java - page 521

*/
public

public static static void void main ( String [] argv ) throws throws IOException {

iif ( argv . length < 1 ) {
System . err . println ( "usage: java DayTimeUDP host" );
System . exit ( 1 );

}
String host = argv [ 0 ];
InetAddress servAddr = InetAddress . getByName ( host );
DatagramSocket sock = new

new DatagramSocket ();
//sock.connect(servAddr, DAYTIME_PORT);
byte byte [] buffer = new new byte byte [ PACKET_SIZE ];

// The udp packet we will send and receive
DatagramPacket packet = new new DatagramPacket (

buffer , PACKET_SIZE , servAddr , DAYTIME_PORT );

/* Send empty max-length (-1 for null byte) packet to server */
packet . setLength ( PACKET_SIZE - 1 );
sock . send ( packet );
System . out . println ( "Sent request" );

// Receive a packet and print it.
sock . receive ( packet );
System . out . println ( "Got packet of size " + packet . getLength ());
System . out . print ( "Date on " + host + " is " +
new new String ( buffer , 0 , packet . getLength ()));

sock . close ();

}

}

I'll run it to my Unix box just to be sure that it works:

$
$ java network.DaytimeUDP dalai
Sent request
Got packet of size 26
Date on dalai is Sat Feb 8 20:22:12 2014
$