Java Cookbook
By Ian F. Darwin


This errata page lists errors outstanding in the most recent printing.


If you have technical questions or error reports, you can send them to
booktech@oreilly.com.  (Please specify the printing date of your copy.)


This page was last modified on March 16, 2004.


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
	Npage-numberN: new feature or API since the book was published


CONFIRMED errors:

Chapter 4, Regular Expressions.

N93N The examples in this chapter use the org.apache.regexp package,
		one of several available APIs at the time the book was
		written.  Java 2 SDK 1.4 and later includes a new package,
		java.util.regex, which provides the same functionality but
		with a slightly different API. I have some  notes on
		conversion from org.apache.regexp package to java.util.regex
		for those who wish to use the "official" API in new
		development.  These can be found at
		http://javacook.darwinsys.com/regex.html

Chapter 5, Numbers


[105]  javacook/RE/BookRank.java line 21;
There's a compiler error when trying to compile javacook/RE/BookRank.java:
unclosed string literal:
    public final static String QUERY = "
        "http://www.quickbookshops.web/cgi-bin/search?isbn=";
The quote on line 21 should be removed:
    public final static String QUERY =
        "http://www.quickbookshops.web/cgi-bin/search?isbn=";


?121? The floating point comparison (equals method) shown here works
		fine for most ranges of numbers, but requires you to
		specify the "epsilon" value. A reader has pointed out that
		you can write this code such that it scales the epsilon,
		at the cost of a few additional calls on the math library,
		by promoting EPSILON to a field in the class, and writing
		public static boolean equals(double a, double b) {
			return Math.abs(a - b) < 
				EPSILON * Math.max(Math.abs(a), Math.abs(b));
		}

{213}	The clone() method does not need a throws clause
		for CloneNotSupportedException.


{268} UnZip.java
The UnZip program has problems with some Zip files that don't have proper 
directory entries, particularly on MS-Windows. A revision that is more 
careful to pre-create the directories is available from the author's web 
site - http://javacook.darwinsys.com/


Chapter 11, Serial IO.


Chapter 21, XML

?659? The doNode() method is not shown; it must process
		whatever nodes you are interested in, and call doRecursive()
		with others, to walk the entire tree. Changing the call 
		on doNode() to doRecursive() will print all the nodes.

{674} In the code for the TickerServer interface, the code contains:

//...code
public interface TickerServer extends java.rmi.Remote {
     public static final String LOOKUP_NAME = "Ticker Service";
//...more code

On some implementations,  a MalformedURLException is thrown because of
the space. Changing the constant String to "TickerService" will resolve
the problem.


Chapter 24, Threads

<725> If you read 24.5 but not 24.6, you might get confused (as a
		reviewer on Amazon.com apparently did) and think that
		synchronization locks a method (or that I think this is the case).
		In fact, the lock is an attribute of an object; a
		synchronized method running in an object does lock
		out all other synchronized methods running in the
		same object (or synchronized blocks synchronized
		on the object). This will be clarified in the next
		edition.

Chapter 26, Using Java with Other Languages

{796} Not shown in the book, but online in javacooksrc/DBM/jdbm.c.
	A call to malloc() incorrectly uses k.dsize instead of v.dsize to
	allocate the size, causing the example to not work.

	line 97:

	is:
	v.dptr = malloc(k.dsize);		   // XXX

	should be:
	v.dptr = malloc(v.dsize);		   // XXX