2 JavaTutorial Errors quick fix

[john price]

Taken directly from http://download.oracle.com/javase/tutorial/networking/sockets/examples/KnockKnockServer.java
It is the Java tutorials.
Here is the code and the error.
Code:

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

public class KnockKnockServer {
    public static void main(String[] args) throws IOException {

        ServerSocket serverSocket = null;
        try {
            serverSocket = new ServerSocket(4444);
        } catch (IOException e) {
            System.err.println("Could not listen on port: 4444.");
            System.exit(1);
        }

        Socket clientSocket = null;
        try {
            clientSocket = serverSocket.accept();
        } catch (IOException e) {
            System.err.println("Accept failed.");
            System.exit(1);
        }

        PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
        BufferedReader in = new BufferedReader(
				new InputStreamReader(
				clientSocket.getInputStream()));
        String inputLine, outputLine;
        KnockKnockProtocol kkp = new KnockKnockProtocol();

        outputLine = kkp.processInput(null);
        out.println(outputLine);

        while ((inputLine = in.readLine()) != null) {
             outputLine = kkp.processInput(inputLine);
             out.println(outputLine);
             if (outputLine.equals("Bye."))
                break;
        }
        out.close();
        in.close();
        clientSocket.close();
        serverSocket.close();
    }
}

And errors:

C:\Users\cc11rocks\Documents\JavaCrap>javac KnockKnockServer.java
KnockKnockServer.java:28: cannot find symbol
symbol  : class KnockKnockProtocol
location: class KnockKnockServer
        KnockKnockProtocol kkp = new KnockKnockProtocol();
        ^
KnockKnockServer.java:28: cannot find symbol
symbol  : class KnockKnockProtocol
location: class KnockKnockServer
        KnockKnockProtocol kkp = new KnockKnockProtocol();
                                     ^
2 errors

Please just fix it for me since
1. It's from the tutorials and
2. I don't know hardly anything about servers/clients (which I am using this a learning experience)
Thanks,
John Price aka cc11rocks

[Hauke Ingmar Schmidt]

You are linking to a single source file which is useless. The tutorial is here.

But you need to learn the basics first.