UDP Communication....Server waiting for packet indefinitly.....!!

Question

Hi i am a beginner in Java. I was just trying out a UDP communication between a server and client. but what happens is that the server wait continuously but never receives the client's packet. Could some one help me out plz!! Thz !!
CODE - THE CLIENT
public void Client () throws Exception{
public void trial()
System.out.println("I am Trial");
try
System.out.println("Intizlizing client");
clientSocket=new DatagramSocket(clientPort);
String strData = "Message from Client";
byte[] data=strData.getBytes();
clientSocket.send(new DatagramPacket(data,data.length,InetAddress.getLocalHost(),serverPort));
clientSocket.close();
System.out.println("Data Sent");
catch(Exception e)
System.out.println(e);
THE SERVER
public class Server {
public static int serverPort =998;
public static int clientPort=999;
public static int buffer_size=1024;
public static DatagramSocket serverSocket;
public static byte buffer[]=new byte[1024];
public void receive(){
try{
serverSocket=new DatagramSocket(serverPort);
while(true)
System.out.println("Socket Intialized");
DatagramPacket p=new DatagramPacket(buffer,buffer.length);
System.out.println("Packet Intialized");
serverSocket.receive(p);
System.out.println(new String(p.getData(),0,p.getLength()));
catch (Exception e) {
System.out.println("Server Error: "+e);
MAIN
public class UDP_ClnSer {
public static void main(String[] args) throws Exception {
// TODO code application logic here
try {
//ds =new DatagramSocket (999);
ClientPack.Client cl=new ClientPack.Client(); *\\This is Client Object*
cl.trial();
System.out.println("Client Intialized");
parser.Server ser=new parser.Server(); *\\ This is Server Object*
ser.receive();
System.out.println("hai done");
System.out.println("I am Main");
catch (Exception e)
System.out.println(e);
}

Answer 1

You start the client, make it send a datagram and only after this you start the server.
Why do you expect the server to receive something sent a few milliseconds ago?
And other mistakes. Here is a link to a simple example [http://java.sun.com/docs/books/tutorial/networking/datagrams/clientServer.html]