UDPClient.java

import java.io.*; 
import java.net.*;
import java.nio.ByteBuffer;
import java.nio.ByteOrder; 
class UDPClient { 
    public static void main(String args[]) throws Exception {
        InetAddress localhost = InetAddress.getLocalHost();
        String hostname = localhost.getHostName();

        /* BufferedReader inFromUser = 
        new BufferedReader(new InputStreamReader(System.in));  */
        
        DatagramSocket clientSocket = new DatagramSocket(); 
        
        InetAddress ipAddress = InetAddress.getByName(hostname); 
        
        //byte[] sendData = new byte[1024]; 
        //byte[] receiveData = new byte[1024];
        
        byte[] data;
        DatagramPacket sendPacket;
        
        //String sentence = inFromUser.readLine(); 
        
        //sendData = sentence.getBytes("UTF-8");

        for(int i = 0; i <= 1000000; i++) {
            data = ByteBuffer.allocate(4).putInt(i).array(); 
            
            sendPacket = new DatagramPacket(data,
            data.length, ipAddress, 2345);

            clientSocket.send(sendPacket);

            //wait
            /* for(long j = 0; j < 1000000000; j++);
            for(long j = 0; j < 1000000000; j++); */
        }

        /* DatagramPacket sendPacket = new DatagramPacket(sendData,
        sendData.length, ipAddress, 2345); */ 
        
        //clientSocket.send(sendPacket);
        
        /* DatagramPacket receivePacket = 
        new DatagramPacket(receiveData, receiveData.length); */ 
        
        /* clientSocket.receive(receivePacket); 
        int rcvLen = receivePacket.getLength();
        
        String modifiedSentence = 
        new String(receivePacket.getData(), 0, rcvLen, "UTF-8");
        
        System.out.println("FROM SERVER: " + modifiedSentence); */ 
        
        clientSocket.close(); 
    }
}