Ping Client error - help. =]

[ICER]

Hi, I am writing a UDP ping client program. I am using a function called PingMessage, however I keep getting compile errors that say:
"cannot find symbol
symbol: class PingMessage"

Maybe I am overlooking something small... I was up all night coding this.
Thanks in advance for any help!

Code here:

import java.io.*;
import java.net.*;
import java.lang.Object;
import java.util.*;
import java.net.InetAddress.*;

public class PingClient implements Runnable
{
	String hostname;
	int portnumber;
	int pingReplies = 0;
	static final int pingLength = 1024;
	static final int PINGS = 10;
	static final int TIMEOUT = 1000;
	static final int WAIT = 5000;
	/* Arrays */
	static boolean[] replies = new boolean[PINGS];
	static long[] RTT = new long[PINGS];
	DatagramSocket socket;
	
	public PingMessage receivePing() throws SocketTimeoutException
	{
		byte recvBuf[] = new byte[pingLength];
		DatagramPacket recvPacket = new DatagramPacket(recvBuf, pingLength);
		PingMessage reply = null;
		try
		{
			socket.receive(recvPacket);
			System.out.println("Received message from " + recvPacket.getAddress() + ":" + recvPacket.getPort());
			String recvMsg = new String(recvPacket.getData());
			reply = new PingMessage(recvPacket.getAddress(), recvPacket.getPort(), recvMsg);
		}
		catch (SocketTimeoutException e)
		{
			throw e;
		}
		catch (IOException e)
		{
			System.out.println("Error reading from socket.");
		}
		return reply;
	}
	
	public void sendPing(PingMessage ping)
	{
		InetAddress host = ping.getHost();
		int port = ping.getPort();
		String message = ping.getContents();
		
		DatagramPacket packet = new DatagramPacket(message.getBytes(), message.length(), host, port);
		socket.send(packet);
		System.out.println("Sent packet to " + host + ":" + port);
	}
	
	private void handleReply(String reply)
	{
		String[] tmp = reply.split(" ");
		int pingNumber = Integer.parseInt(tmp[1]);
		long then = Long.parseLong(tmp[2]);
		replies[pingNumber] = true;
		
		Date now = new Date();
		RTT[pingNumber] = now.getTime() - then;
		pingReplies++;
	}
	
	public PingClient (String host, int port)
	{
		hostname = host;
		portnumber = port;
	}
	
	public void createSocket()
	{
		try
		{
			socket = new DatagramSocket();
		}
		catch (SocketException e)
		{
			System.out.println("Error creating socket.");
		}
	}
	
	public void createSocket(int port)
	{
		try
		{
			socket = new DatagramSocket(port);
		}
		catch (SocketException e)
		{
			System.out.println("Error creating socket.");
		}
	}
	
/*-----------------------------------------------------------*/	
	public void run()
	{
		createSocket();
		socket.setSoTimeout(TIMEOUT);
		
		for (int i = 0; i < PINGS; i++)
		{
			Date now = new Date();
			String message = "PING " + i + " " + now.getTime() + " ";
			replies[i] = false;
			RTT[i] = 1000000;
			PingMessage ping = null;
		}
		
		ping = new PingMessage(InetAddress.getByName(hostname), portnumber, message);
		sendPing(ping);
		
		PingMessage reply = receivePing();
		handleReply(reply.getContents());
		
		try
		{
			socket.setSoTimeout(WAIT);
		}
		catch (SocketTimeoutException e)
		{
			System.out.println("Error setting timeout REPLY_TIMEOUT: ");
		}
		while (pingReplies < PINGS)
		{
			try
			{
				PingMessage reply = receivePing();
				handleReply(reply.getContents());
			}
			catch (SocketTimeoutException e)
			{
				pingReplies = PINGS;
			}
		}
		
		for (int i = 0; i < PINGS; i++)
		{
			System.out.println("PING " + i + ": " + replies[i] + " RTT: " + RTT[i]);
		}
	}
	/*----------------------------------------------------------------*/
	public static void main(String args[])
	{
		String host = null;
		int port = 0;
		
		host = args[0];
		port = Integer.parseInt(args[1]);
		System.out.println("Contacting host " + host + " at port " + port);
		PingClient Client = new PingClient(host, port);
		Client.run();
	}
}

[CJSLMAN]

huh... I don't see a PingMessage class. I only see a PingClient class... does PingMessage.class exist?

Luck,
CJSL

[ICER]

I am getting the error from the function:

public PingMessage receivePing()

Am I using that correctly?

[Steve11235]

What is a PingMessage? Either it exists somewhere, and you didn't import it, or you haven't written it yet.