Errata

Java 7 Pocket Guide

Errata for Java 7 Pocket Guide

Submit your own errata for this product.

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 30
.

It appears :
publis static final int INT_VALUE = -200;

should instead read :
public static final int INT_VALUE = -200;

Note from the Author or Editor:
Thank you for the errata. The change has been made for JPG, 4th Edition.

 Anonymous  May 14, 2015 
Printed
Page 8
in ASCII character table

the character for 99 should be lower case 'c' - not capital.

and character for 115 should be lower case 's' - not capital

Note from the Author or Editor:
Agreed, these changes should be made

 Angelo Quaglia  Mar 31, 2014 
Printed
Page 62
bottom

Should "strings >= 4 & strings <= 8" be changed to "strings >=4 && strings <= 8"?

Note from the Author or Editor:
Excellent, thank you... yes short circuit operators would be best suited here.

This will change and the one on the next page, in the the Java 8 Pocket Guide.

 Steve Rhoads  Mar 17, 2014 
Printed
Page 47
Lower

The class Curtain contains executable statements outside of a method(). Is this valid?

Note from the Author or Editor:
Replaced this:

public class Curtain {
Builder builder = new Builder();
builder.setWallType(this);
}

with this:

// Print the contents of class curtain
System.out.println(this);

in the Java 8 Pocket Guide.

Thank you for the observation.

 Steve Rhoads  Mar 17, 2014 
Printed
Page 45
middle

In the class ElectionManager there is executable code that is not part of a method?

int i = getIdFromConsole();
Candidate candidate = new Candidate();

Is this allowed? Should the code be inside "static { }"? Needs an explanation if permitted.

Note from the Author or Editor:
Thank you for the errata. The JPG, 4th edition has been updated.

 Steve Rhoads  Mar 17, 2014 
Printed
Page 39
middle

There is an extra close bracket. I believe that "} // end" should be deleted.

Note from the Author or Editor:
} catch (CloneNotSupportedException cnse)

should read

} catch (CloneNotSupportedException cnse) {

So, we need to add a bracket, not remove one.

This will be added to the Java 8 Pocket Guide.

 Steve Rhoads  Mar 17, 2014 
Printed
Page 34
middle

The text starting with "table.setLength(72);" to the end needs to be shift left.

There is an extra close bracket at the end.

Note from the Author or Editor:
Formatting is off and last '}' should be dropped... should look like:

void roomSetup() {
// Reference passing
Table table = new Table();
table.setLength(72);
// Length will be changed
modTableLength(table);

// Primitive passing
// Value of chairs not changed
int chairs = 8;
modChairCount(chairs);
}

void modTableLength(Table t) {
t.setLength(36);
}

void modChairCount(int i) {
i = 10;
}

This will be changed in the Java 8 Pocket Guide, thank you.

 Steve Rhoads  Mar 17, 2014 
PDF, ePub
Page 21
3rd paragraph (examples with floats)

The text says "No explicit cast is necessary for an int literal because an int fits in a float .".

While it's true when casting an int to a double, it's actually false when casting an int to a float.

See http://stackoverflow.com/a/2781125 for a detailled explanation.

Note from the Author or Editor:
I made this change for the Java 8 Pocket Guide:

Even though no explicit cast is necessary for an +int+ literal, an +int+ will not always fit into a +float+ where the value exceeds about 2^23.

Thank you.

 Mathieu Olivier  Jan 28, 2014 
ePub
Page 34
last code block

This error has already been reported and corrected for the PDF version, but it's still present in the ePub version.

void modChairCount(int 1)
{
1 = 10;
}

should read

void modChairCount(int i)
{
i = 10;
}


Note from the Author or Editor:
The change is going into the Java 8 Pocket Guide.

Thank you.

 Mathieu Olivier  Jan 28, 2014 
PDF
Page 103
4th paragraph

Based on the command in the first line of the paragraph:

javac -d /opt/hwapp/classes HelloWorld.java

(i.e., /opt/hwapp/src/com/oreilly/tutorial/)

should read:

(i.e., /opt/hwapp/classes/com/oreilly/tutorial/)

Note from the Author or Editor:
I made the update into the Java 8 Pocket Guide.

Thank you.

 Ryan Gomoto  Nov 01, 2013 
Printed
Page 22
Table 3-2, row 3, last column

The second example "-1e300/1e300" evaluates to -1, not -0.0

I think it should read "-1e-300/1e300" instead.

Note from the Author or Editor:
Yes, it should read "-1e-300/1e300" instead.

Thank you.

 D K  Aug 30, 2013  Oct 25, 2013
Printed
Page 147
All code

The Java code on pages 147 and 148 should be appropriately formatted, as was done in the previous edition.

 Robert Liguori
Robert Liguori
 		 Jul 30, 2013  Aug 02, 2013
Printed
Page 54
last two code blocks

In one code block there is a method myMethod, but in the next - someMethod. Looks a little inconsistent.

Note from the Author or Editor:
Feedback fb =
someMethod.getAnnotation(Feedback.class);

should read:

Feedback fb =
myMethod.getAnnotation(Feedback.class);

 Sergey Stolyarov  Jul 13, 2013  Aug 02, 2013
PDF
Page 53
the last paragraph

The last paragraph:

Because @Override is a marker annotation, a compile warning
will be returned if the toString() method cannot be found:

But instead of "toString" there should be "tooString", I think.

Note from the Author or Editor:
Because @Override is a marker annotation, a compile warning will be returned if the toString() method cannot be found:

should read:

Because @Override is a marker annotation, a compile warning will be returned if the method to be overridden cannot be found.

---------------------------------

In addition, on page 54, the two comments and 4 lines of code at the top of the page (six lines total) should be removed.

 Sergey Stolyarov  Jul 13, 2013  Aug 02, 2013
PDF
Page 52
last code block

There is an incorrect definition of enumeration:

class enum DisplayButton {

"class" keyword is not needed here.

Note from the Author or Editor:
class enum DisplayButton {

should read

enum DisplayButton {

 Sergey Stolyarov  Jul 13, 2013  Aug 02, 2013
PDF
Page 49
first code block

Indentation for first code block looks a little confusing:

printRows() {
for (String name: names)
System.out.println(name);
}


Note from the Author or Editor:
The code should be formatted as shown:

printRows() {
for (String name : names)
System.out.println(name);
}

optionally, it can be shown with parentheses:

printRows() {
for (String name : names) {
System.out.println(name);
}
}

For the next printing of the book, I will leave it up to the discretion of the publisher.

 Sergey Stolyarov  Jul 13, 2013  Aug 02, 2013
PDF
Page 46
3rd paragraph

3rd paragraphs states as follows:

The keyword super in the Curtain class�s default constructor is
used to access methods in the superclass overridden by methods
in the subclass

But there is no constructor in the next paragraph, instead there is a method printSpecs() definition.

Note from the Author or Editor:
Thank you for this errata, it has been updated in the JPG, 4th edition.

 Sergey Stolyarov  Jul 13, 2013 
Printed
Page 34
last code block

Method defined as follows:

void modChairCount(int 1) {
1 = 10;
}

Identifier name cannot be ?1?.

Note from the Author or Editor:
void modChairCount(int 1) {
1 = 10;
}

should read

void modChairCount(int i) {
i = 10;
}

 Sergey Stolyarov  Jul 13, 2013  Aug 02, 2013