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

public class PingClient
{
	public static void main(String[] args)
	{
		int size = 64;
		int port;
		byte[] sendBuf = new byte[size];
		Scanner scan = new Scanner(System.in);


		if(args.length != 1)
		{
			System.out.println("For use with PingServer Client");
			return;
		}

		System.out.println("Enter packet size(default = 64): ");
		size = scan.nextInt();

		System.out.println("Enter server Port(default = 4445): ");
		port = scan.nextInt();

		DatagramSocket socket = new DatagramSocket();
		byte[] buf = new byte[size];
		InetAddress address = InetAddress.getByName(args[0]);
		DatagramPacket packet = new DatagramPacket(buf, buf.length, address, port);

		socket.send(packet);

		packet = new DatagramPacket(buf, buf.length);
		socket.receive(packet);
		String received = new String(packet.getData(), 0, packet.getLength());
		System.out.println(received);
	}
}