Jakarta Commons Cookbook

Errata for Jakarta Commons Cookbook

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The errata list is a list of errors and their corrections that were found after the product was released. If the error was corrected in a later version or reprint the date of the correction will be displayed in the column titled "Date Corrected".

The following errata were submitted by our customers and approved as valid errors by the author or editor.

Color Key: Serious Technical Mistake Minor Technical Mistake Language or formatting error Typo Question Note Update



Version Location Description Submitted By Date Submitted Date Corrected
Printed
Page xiii
Under "Chapter 4, Functors" subheading, 2nd sentence

"...predicates, transformers, and closures, and functors,..." ^^^ should be: "...predicates, transformers, closures, and functors,..."

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Page 5

"import org.apache.commons.lang.builder.ToStringBuilder" should be "import org.apache.commons.lang.builder.ReflectionToStringBuilder"

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Page 5
Error in toString() method

public void toString() { ReflectionToStringBuilder.toString(this); } Should read: public String toString() { return ReflectionToStringBuilder.toString(this); }

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Page 6
Error in toString() method

public void toString() { ReflectionToStringBuilder.toString( this ); } Should be: public String toString() { return ReflectionToStringBuilder.toString( this ); }

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Page 10

"PoliticalCandidate.class.isAssignableFrom(o)" should read "PoliticalCandidate.class.isAssignableFrom(o.getClass())"

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Page 10
Variable misnamed in code example.

"PoliticalCandidate pc = (PoliticalCandidate) o;" should be "PoliticalCandidate ps = (PoliticalCandidate) o;"

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Page 12

"public int compareTo(Object o) {" should read "public int compareTo(Object obj) {"

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Page 25
code swatch at the center of page 25

Existing example: // Rounding to the nearest hour Date wokeUp = new Date(); Date wokeUpAround = DateUtils.round ( now, Calendar.HOUR ); Proposed change: // Rounding to the nearest hour Date wokeUp = new Date(); Date wokeUpAround = DateUtils.round ( wokeUp, Calendar.HOUR );

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Page 28
1-16

private Flavor(String name, int value) { super( name, value ); } should be: private Flavor(String name) { super( name ); }

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Page 47
Code sample should be completely replaced with the following

String variables = "{45}, {35}, {120}"; int sum = 0; String[] tokens = StringUtils.split( variables, "," ); for( int i = 0; i < tokens.length; i++ ) { String numberStr = StringUtils.substringBetween(tokens[i], "{", "}"); Integer number = new Integer( numberStr ); sum += number.intValue(); } System.out.println( "Variables: " + variables + ", Sum: " + sum );

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Printed
Page 55
Code at top

The line String name2Temp=StringUtils.replaceChars(name1,punctuation,""); should be using name2 instead of name1.

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Page 56
In code listing,

"countMatches(,"futility")" should be "countMatches(line,"futility")"

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Page 61

The correct Levenshtein distance between "Steve" and "Stereo" is 2. The example output incorrectly lists this as 3.

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Page 73
Last lines of top code, formatting error

"This example retrieves the name property of the author property on the Book object, printing "Ralph Waldo Emerson"" should be a seperate paragraph of text.

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Page 73
middle of page:

"General Exception is caught." should not be the first line of the code example and should be removed.

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Page 78
Paragraph under figure

The getProperty() method parses the supplied property name, splitting the name as the period character. should be: The getProperty() method parses the supplied property name, splitting the name at the period character.

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Page 86

Levenshtein distance between "Word" and "World" is one. Output incorrectly lists Levenshtein distance as 2.

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Page 87
the code in the Solution

in the book: boolean nameReadable = PropertyUtils.isReadable( book, "name"); boolean nameReadable = PropertyUtils.isWritable( book, "name"); should be: boolean nameReadable = PropertyUtils.isReadable( book1, "name"); boolean nameReadable = PropertyUtils.isWritable( book1, "name"); comments: should be "book1" instead of "book"

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Printed
Page 88
There is a missing line, the predicateArray is referenced

without being defined. The following changes are necessary: // A Predicate that returns true if the "name" property is not null Predicate teamNotNull = new BeanPredicate( "name", new NotNullPredicate( ) ); // A Predicate that returns true if the "coach.firstName" property // is "Tom" Predicate coachFirstName = new BeanPredicate( "coach.firstName", new EqualsPredicate("Tom") ); // Tie two Predicates together into an AndPredicate Predicate validateTeam = new AllPredicate( predicateArray ); should read: // A Predicate that returns true if the "name" property is not null Predicate teamNotNull = new BeanPredicate( "name", new NotNullPredicate( ) ); // A Predicate that returns true if the "coach.firstName" property // is "Tom" Predicate coachFirstName = new BeanPredicate( "coach.firstName", new EqualsPredicate("Tom") ); Predicate[] predicateArray = new Predicate[] { teamNotNull, coachFirstName }; // Tie two Predicates together into an AndPredicate Predicate validateTeam = new AllPredicate( predicateArray );

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Printed
Page 94
Code references an unknown variable due to typo. Code should be changed as follows

BasicDynaClass politicianClass = new BasicDynaClass( "politician", BasicDynaBean.class, props ); should read: BasicDynaClass politicianClass = new BasicDynaClass( "politician", BasicDynaBean.class, beanProperties );

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Page 95
See Also of 3.18

The See Also section is incorrect. Those things are not covered in the book.

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Page 108
Example 4-4

Unintended errata: The suit order isn't right for official Poker or Bridge. To sort in official order, please replace: private String[] suitOrder = { "S", "C", "D", "H" }; with private String[] suitOrder = { "C", "D", "H", "S" };

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Page 137
Recipe 5.4

Chapter 5, Recipe 5.4 EarthQuake quake1 = new EarthQuake( ); quake1.setLocation( "Chicago, IL" ); quake1.setIntensity( new Float( 6.4f ) ); quake1.setIntensity( new Float( 634.23f ) ); <--- setDepth quake1.setTime( new Date( ) ); quakes.add( quake1 ); EarthQuake quake2 = new EarthQuake( ); quake2.setLocation( "San Francisco, CA" ); quake2.setIntensity( new Float( 4.4f ) ); quake2.setIntensity( new Float( 63.23f ) ); <--- setDepth quake2.setTime( new Date( ) ); quakes.add( quake2 );

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Page 137
Recipe 5.4 / Example 5-1;should be

public void setIntensity(Float intensity) { this.intensity = intensity; } <--- setIntensity

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Page 138
"majorQuakes.hasMore()" should be "majorQuakes.hasNext()"

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Page 183
Table

getBooleanBalue should be getBooleanValue

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Page 229

Chapter 8: "There were significant changes between the pre-release version of Commons Math and the 1.0 release of Commons Math. All of the concepts introduced in Chapter 8 of the Commons Cookbook remain valid, but many of the code examples will not compile as written. You will need to consult the Commons Math API in the 1.0 release."

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Printed
Page 256 - 9.3
code example line 11.

There should not be a semi-colon after the line 10. String expr = "${opera.name} was composed by ${opera.composer} in ${opera.year}. "; "This opera has ${opera.acts.size( )} acts, and it is performed in " + "${opera.language( )}"; Should read: String expr = "${opera.name} was composed by ${opera.composer} in ${opera.year}. " + "This opera has ${opera.acts.size( )} acts, and it is performed in " + "${opera.language( )}";

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Printed
Page 256
The following line of code should follow

"opera.setYear(1791);": opera.setLanguage("German")

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Page 256
"${opera.language()}" should be "${opera.language}".

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Page 258
In the sorting example, there is a missing line in the code

example, which will cause every ball to end up in the Misc-bin. A break neds to be added after the call to sendBall() as follows: if( result.booleanValue() == true ) { sendBall( ball, basket ); } Should read: if( result.booleanValue() == true ) { sendBall( ball, basket ); break; }

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Printed
Page 258
basket is an undefined variable.

"sendBall(ball, basket );" should read "sendBall( ball, bin );"

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Page 290

"FileUtils.sizeOfDirectory()" should read "FileUtils.sizeOfDirectory(dir)"

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Page 292
Last paragraph

".htm" is split across lines as if it were ". htm"

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Printed
Page 320
Paragraph under discussion

MIME is Multipurpose Internet Mail Extensions, not Main Extensions.

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Page 330
First paragraph

The sentence "If ALLOW_CIRCULAR_REDIRECTS is set to true," should read "If ALLOW_CIRCULAR_REDIRECTS is set to false,"

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Page 341
Paragraph under discussion

XPath is generally used by select nodes in an XML document... should be: XPath is generally used to select nodes in an XML document...

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Printed
Page 349
line eight of the example is incomplete.

It reads: logger.info( "Looking for XML files in " it should be: logger.info( "Looking for XML files in " + dataDir.getAbsolutePath() );

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