UDPClient socket.receive() problem

Question

I have a slight problem.... while receiving the packets.....
          /***  DECLARE AND INSTANCIATE DATAGRAM TO RECEIVE ***/
          /* buffer for holding the incoming datagram*/          
          byte[] buffer = new byte[size];
          DatagramPacket reply[] = new DatagramPacket[size];     
               start = System.currentTimeMillis();
                                         /***  SEND DATAGRAM PACKETS  (THIS SECTION WORKS FINE)***/
          for(counter = 0; counter < size; counter++)
           request[counter] = new DatagramPacket(m, m.length, aHost, serverPort);
           aSocket.send(request[counter]);               
          System.out.println("Sent all");
          /***  RECEIVE DATAGRAM PACKETS  (   PROBLEM SECTION   )***/
          for (Getcount = 0; Getcount < size ; Getcount++)
               System.out.println("Receving " +Getcount);
               reply[Getcount] = new DatagramPacket(buffer, buffer.length);     
               System.out.println("got pack in array");
SPECIFICALLY PROBLEM IS HERE >>>>aSocket.receive(reply);
HOW DO I receive the package?
I cannot try to recieve individual because I doono which one is going to show up first... so I cant put in a lopp saying that aSocket.receive(reply[Getcount]); also I cannot get it using aSocket.receive(reply);
because the receieve needs a datagram packet.....
               System.out.println("Received by socket");
          end = System.currentTimeMillis();
          difference = end - start;
          System.out.println("Reply: " + new String(reply[0].getData()));     
          System.out.println("Difference in time was "+difference+" milliseconds");

Answer 1

I am setting the size as 100 in the arg[0] but the problem is that
import java.net.*;
import java.io.*;
import java.text.*;
import java.util.*;
public class UDPClientTest
     public static void main(String args[])
          DatagramSocket aSocket = null;
       try
          aSocket = new DatagramSocket();   
          InetAddress aHost = InetAddress.getByName(args[1]);
          int serverPort = 6789;
          int counter;
          int Getcount;
          /***  SET ARRAY SIZE FROM COMMAND PROMPT  ***/
          int size = Integer.parseInt(args[0]);
          byte[] m = new byte[size];
          /***  FILL ARRAY WITH RANDOM NUMBERS  ***/
          for(int count = 0; count < size; count ++)
               m[count] = (byte)(Math.random()*1000);
          /***  INITIALIZE EVERYTHING HERE (BEFORE TIMER STARTS COUNTING TIME)  ***/
          /***  DECLARE AND INSTANCIATE DATAGRAM TO SEND ***/
          DatagramPacket request[] = new DatagramPacket[size];
          /***  DECLARE AND INSTANCIATE DATAGRAM TO RECEIVE ***/
          /* buffer for holding the incoming datagram*/          
          byte[] buffer = new byte[10000];
          DatagramPacket reply = new DatagramPacket(buffer,buffer.length);
          /***  VARIABLES FOR TIMERS  ***/
          long start = 0, end = 0, difference = 0;
          /*** START TIMER (USING SYSTEM TIMER NOT DATE OBJECT FOR MORE ACCURACY)***/
          start = System.currentTimeMillis();
          /***  SEND DATAGRAM PACKETS  ***/
          for(counter = 0; counter < size; counter++)
           request[counter] = new DatagramPacket(m, m.length, aHost, serverPort);
           aSocket.send(request[counter]);               
          System.out.println("Sent all");
          /***  RECEIVE DATAGRAM PACKETS  ***/
               >>>>>>>>>PROBLEM BELOW<<<<<<<<<<<<<<<
          aSocket.setSoTimeout(1000000000);
/****PROBLEM: EVEN THOUGH I HAVE SIZE WHICH IS 100 when I start program in arg[0] the program just starts from 99 but stops at 17 and prints what I have displayed after code and waits ****/
          while(--size >= 0)
               reply = new DatagramPacket(buffer,buffer.length);   
          try{
               System.out.println(size);
               aSocket.receive(reply);   
               System.out.println("After receive");
          } catch(SocketException e){System.out.println("Socket Exception "+e.getMessage());}
          /***  END TIMER  ***/
          end = System.currentTimeMillis();
          difference = end - start;
          System.out.println("Reply: " + new String(reply.getData()));     
          System.out.println("Difference in time was "+difference+" milliseconds");
          catch (SocketException e){System.out.println("Socket: " + e.getMessage());}
          catch (IOException e){System.out.println("IO: " + e.getMessage());}
          finally {if(aSocket != null) aSocket.close();}
}.........STARTS WITH 99 and prints this below
After receive
27
After receive
26
After receive
25
After receive
24
After receive
23
After receive
22
After receive
21
After receive
20
After receive
19
After receive
18
After receive
17
then it justs waits............
Please help me.........