Java Network Programming, Second Edition
By Elliotte Rusty Harold


Following are the changes made in the 3/01 reprint.


Here's a key to the markup:

        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem
        ?page-number?: reader question or request for clarification


[133] In the first paragraph: 

"Notice the addition of a <code>start()</code> method"

now reads: 

"Notice the addition of the <code>calculateDigest()</code> 
method to start the thread."


{177} The second sentence of the third paragraph now reads, "The 
conditional operator ? tests whether signedByte is
negative." That is, unsignedByte has been changed to signedByte.


(195) In the third paragraph, "foloowing" now reads "following".


{220} In Example 7-8, the line:

System.out.println(URLEncoder.encode("This\string\"has\"quote\"marks"));

was missing a quote mark after the first slash. It now reads:

System.out.println(URLEncoder.encode("This\"string\"has\"quote\"marks"));


[323-324] In Example 10-7, the finally block was attached to the wrong 
try block. It is now inside the for loop. Here's
the corrected program:

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

public class PortScanner {

   public static void main(String[] args) {

     String host = "localhost";

     if (args.length > 0) {
       host = args[0];
     }

     try {
       InetAddress theAddress = InetAddress.getByName(host);
       for (int i = 1; i < 65536; i++) {
         Socket connection = null;
         try {
           connection = new Socket(host, i);
           System.out.println("There is a server on port "
            + i + " of " + host);
         }
         catch (IOException e) {
           // must not be a server on this port
         }
         finally {
           try {
             if (connection != null) connection.close();
           }
           catch (IOException e) {}
         }
       } // end for
     } // end try
     catch (UnknownHostException e) {
       System.err.println(e);
     }

   }  // end main

}  // end PortScanner


[327] 
InterruptedException 

has been changed to: 

InterruptedIOException


{354} In the code fragment in the middle of the page,
InetAddress.getHostByName now reads InetAddress.getByName


{385} About three quarters of the way down the page, at the end of 
the second code block:

} // end try

now reads:

} // end if