清华大学：JAVA教学课件：12-2eg

例12-2
URL url = getCodeBase();
String host = url.getHost();
try{
InetAddress address = InetAddress.getByName(host);
}catch(Exception e){}
Try{
DatagramSocket socket = new DatagramSocket();
DatagramPacket packet = new DatagramPacket(buf,length,address,port);
socket.send(packet);
}catch(Exception e){}