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import java.io.*;
import java.net.*;
/**
* demonstrates how to write datagram server
*
* @see datagramclientdemo
***/
public class datagramserverdemo
{
public static void main(string args[]) throws exception
{
byte data[] = new byte[20];
// client on port 4444, server on 5555
datagramsocket socket = new datagramsocket(5555);
datagrampacket packet = new datagrampacket(data, 20);
socket.receive(packet);
string received = new string(packet.getdata(), 0);
system.out.println(received);
string sendmsg="hello back";
sendmsg.getbytes(0, sendmsg.length(), data, 0);
packet = new datagrampacket(data, 20,
packet.getaddress(),
packet.getport());
socket.send(packet);
}
}
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