Java UDP Communication

import java.io.*;
import java.net.*;

public class QuoteClient {

    public static void main(String[] args) {
        if (args.length < 2) {
            System.out.println("Syntax: QuoteClient <hostname> <port>");
            return;
        }

        String hostname = args[0];
        int port = Integer.parseInt(args[1]);

        try {
            InetAddress address = InetAddress.getByName(hostname);
            DatagramSocket socket = new DatagramSocket();

            while (true) {

                DatagramPacket request = new DatagramPacket(new byte[1], 1, address, port);
                socket.send(request);

                byte[] buffer = new byte[512];
                DatagramPacket response = new DatagramPacket(buffer, buffer.length);
                socket.receive(response);

                String quote = new String(buffer, 0, response.getLength());

                System.out.println(quote);
                System.out.println();

                Thread.sleep(10000);
            }

        } catch (SocketTimeoutException ex) {
            System.out.println("Timeout error: " + ex.getMessage());
            ex.printStackTrace();
        } catch (IOException ex) {
            System.out.println("Client error: " + ex.getMessage());
            ex.printStackTrace();
        } catch (InterruptedException ex) {
            ex.printStackTrace();
        }
    }
}


RUN:java QuoteClient localhost 17


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import java.io.*;
import java.net.*;
import java.util.*;


public class QuoteServer {
    private DatagramSocket socket;
    private List<String> listQuotes = new ArrayList<String>();
    private Random random;

    public QuoteServer(int port) throws SocketException {
        socket = new DatagramSocket(port);
        random = new Random();
    }

    public static void main(String[] args) {
        if (args.length < 2) {
            System.out.println("Syntax: QuoteServer <file> <port>");
            return;
        }

        String quoteFile = args[0];
        int port = Integer.parseInt(args[1]);

        try {
            QuoteServer server = new QuoteServer(port);
            server.loadQuotesFromFile(quoteFile);
            server.service();
        } catch (SocketException ex) {
            System.out.println("Socket error: " + ex.getMessage());
        } catch (IOException ex) {
            System.out.println("I/O error: " + ex.getMessage());
        }
    }

    private void service() throws IOException {
        while (true) {
            DatagramPacket request = new DatagramPacket(new byte[1], 1);
            socket.receive(request);

            String quote = getRandomQuote();
            byte[] buffer = quote.getBytes();

            InetAddress clientAddress = request.getAddress();
            int clientPort = request.getPort();

            DatagramPacket response = new DatagramPacket(buffer, buffer.length, clientAddress, clientPort);
            socket.send(response);
        }
    }

    private void loadQuotesFromFile(String quoteFile) throws IOException {
        BufferedReader reader = new BufferedReader(new FileReader(quoteFile));
        String aQuote;

        while ((aQuote = reader.readLine()) != null) {
            listQuotes.add(aQuote);
        }

        reader.close();
    }

    private String getRandomQuote() {
        int randomIndex = random.nextInt(listQuotes.size());
        String randomQuote = listQuotes.get(randomIndex);
        return randomQuote;
    }
}

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RUN: java QuoteServer Quotes.txt 17