Errata for Head First Java

Line reads Analying the bug in the Simple Dot Com Game Should read Analyzing the bug in the Simple Dot Com Game

Reads: "Do you believe than a technical book..." it should read: "Do you believe that a technical book..."

to increase the chance that the content gets coded coded into more should read to increase the chance that the content gets coded into more

"Note: there is no Java 2 pre-OS X Mac operating systems" should be: "Note: there is no Java 2 on pre-OS X Mac operating systems"

missing semi-colon after the statement "Button c = new Button("Shoot me")"

if ((x < 3) & (name.equals("Dirk")) { should be if ((x < 3) & (name.equals("Dirk"))) {

Reads: you'll learn about all the Java types in chapter 4 Should read: you'll learn about all the Java types in chapter 3

Lines 9, 10 & 15 2nd quotation mark " is pointing in the wrong direction.

The third word in the wordListTwo array reads: "valued-added" should read: "value-added"

"Declaraing" now reads: Declaring

The Pool Puzzle snippets have System.out.print("a "); System.out.print("n "); I.e., there appear to be spaces after the letters. it should be: System.out.print("a"); System.out.print("n"); Also, the snippet System,out,print("an"); is not syntactically correct since it uses commas rather than periods between "System", "out" and "print"

1st amoeba: "Amoeba" is misspelled as "Ameoba" in "Ameoba rotation point..." 2nd amoeba "amoeba" is spelled as "ameba" (ameba is an acceptable spelling, just does not match the rest of the page)

The sentence says: "...he added an attribute that all Ameboas would have". should be "Amoebas".

First sentence reads: "So objects have instance and variables and methods,..." now reads: "So objects have instance variables and methods,..."

The 7th item in answers says "I have behavior" it should say "I have behaviors" The 8th item in answers says "Objects use me" The actual puzzle says "I am located in objects"

"compiler always errors" Should be "compiler always errs"

The last sentence of the last paragraph is cut off. It reads: "Don't worry, by the end of the book you'll have most of" The continuation now reads: "these memorized".

theJVM's development team should be the JVM's development team

... allocation issues, you're Big Concern should be ... allocation issues, your Big Concern

Text reads: Create a new int array with a length of 7 now reads: Create a new Dog array with a length of 7

in class BooksTestDrive, the next to last statement is System.out.println(myBooks[x].Author); now reads: System.out.println(myBooks[x].author);

in class BooksTestDrive, the next to last statement is System.out.println(myBooks[x].Author); now reads: System.out.println(myBooks[x].author);

Currently - If a method takes an parameter ... now reads - If a method takes a parameter ...

In Java, You don't... should be In Java, you don't...

So parameters are ALWAYS initialized, because they compiler... should be: So parameters are ALWAYS initialized, because the compiler...

"(although it doesn't care about the size of the variable, so all the extra zeroes on the left end don't matter." Should be : "(although it doesn't care about the size of the variable, so all the extra zeroes on the left end don't matter)."

"it will be same for two references to a single object." should be: "it will be the same for two references to a single object."

The solution on page 91 used many "attendees" names that are not consistent with the Exercise on page 87. For example, the following words: instance variables args encapsulation should be changed to: instance variable argument encapsulate

In the pseudocode for the method, the following statement: "COMPUTE a random number between 0 and 4..." should be changed to: "COMPUTE a random number between 0 and 5..." in order to be consistent with the statment on page 106.

"COMPUTE a random number between 0 and 5 that will be the starting location cell position" should be changed to: "COMPUTE a random number between 0 and 4 that will be the starting location cell position" Since the array begins at 0 and ends at 6, if you fill a series of three cells, beginning in cell 5, your final cell will be in cell 7, which does not exist in the array. This also means that the errata for page 105 (included below), is in error.

In the box Converting a String to an int, the line that reads: Sting num = "2"; should read String num = "2";

"if (locationCells.isEmpty())" should read: "if (locationCells.isEmpty()) {"

The sentence: "Does it makes sense to say X IS-A type Y?" Should be: "Does it make sense to say X IS-A type Y?" the word "makes" should be changed to "make"

This is just a simple formatting error. On page 204 in the second paragraph under "Every class in Java extends class Object" there is a large space. It seems that a new line was inserted before the 'rn' of 'return'.

simple typo: "That't OK." should be "That's OK."

In the Object diagram: change method booleanequals() to: boolean equals()

Simple typo: "(Object don't truly forget" should be "(Objects don't truly forget"

-a Snowboard obect- should be -a Snowboard object-

varaiable, now reads variable,

The answer on page 230 says "I can look different to different people" and the exercise question on 227 says "I can appear different to different people".

The paragraph just above the illustrated drawing of the stack: "barf() declares and creates a new Duck reference variable 'b'..." That variable 'b' should be changed to 'd'

"object's it holds references to?" should read: "objects it holds references to?"

"whose" should be "who is"

Death-by-Dhocolate Brown ought to be Death-by-Chocolate Brown

"default accessn chapter 16 and appendx B" should be "default access in chapter 16 and appendix B"

in the sentence "And what do you think that supeclass constructor does?" should be "And what do you think that superclass constructor does?"

The footnote states: "... (you'll see that on page 22)." now reads: "... (you'll see that on page 252)."

"Look at the Stack series on page 17 again," now reads "Look at the Stack series on page 248 again"

The text just below the Stack figures in item 2 and item 4: Item 2: "go() plops on top of the Stack. 'x' and 'y' are..." This is incorrect. 'x' and 'y' should be changed to 'x' and 'z' Item 4 also needs to change 'x' and 'y' to 'x' and 'z'

"trying to make an new instance of the class," should read: "trying to make a new instance of the class,"

"Assign a value to a final instance variable must be either at the time it is declared, or in the contructor." Should read: "Assigning a value to a final instance variable must be done either at the time it is declared, or in the contructor."

You can't guarnatee should be: You can't guarantee

And we have to this now. should be: And we have to do this now.

".....send something to the another machine." Should be ".....send something to another machine".

"Jimmy Hendrix" should read "Jimi Hendrix"

"Musical Insrument Digital Interface" now reads "Musical Instrument Digital Interface"

In the letter from the compiler to Geeky he says "... be sure to catch any problems before all hell breaks lose." Lose should be loose.

They're knows as (big surprise here)... shoul be: They're known as (big surprise here)...

4 lines from bottom of first paragraph: you're now reads you've

In the Stack figure, the laundry method should be changed to doLaundry method.

The first sentence reads: "Remember from page three, we looked at how MIDI data holds..." MIDI data is discussed on the third page of the chapter, not the third page of the book. Therefore, the sentence should be changed to: "Remember from page 299, we looked at how MIDI data holds..."

Most the code you write should be: Most of the code you write

If you want MouseEvents, implement the MouseEvent interface. should be If you want MouseEvents, implement the MouseListener interface.

"If your class wants to to know..." should be changed to "If your class wants to know..."

interrface should be spelled interface.

"Add buttons, menus, radion buttons, etc." "radion" now reads "radio"

Under the section "Display a JPEG", in the paragraph explained the drawImage method, the second sentence begins: "This says 3 pixels from the left edge of the panel and 2 pixels from the top edge of the panel.." should be changed to: "This says 3 pixels from the left edge of the panel and 4 pixels from the top edge of the panel.." because the parameter list of the drawImage is : (image,3,4,this)

It says: Given the pictures on page 17 ... it now reads: Given the pictures on page 351 ...

At the bottom of the page, in the paintComponent method, the comment refered to an incorrect page number. The second comment that said: //See page 13 for the code should be changed to //See page 349 for the code

Change: "... and the server will have to be certain that all instances of that entity bean in sync ..." To: "... and the server will have to be certain that all instances of that entity bean are in sync ..."

The bullet points are numbered incorrectly; They are: 1 1 1 1 They should be: 1 2 3 4

"It builds directoy on Version Two." should read "It builds directly on Version Two."

There appears to be an extra space between public and void in the method line: "public void setUpGui() {" should read: "public void setUpGui() {"

"layed out" should be "laid out"

Change: "... primary key type (<prim-key-class>, but I don't see ..." To: "... primary key type (<prim-key-class>), but I don't see ..."

"FlowLayout places components lleft to right" should read: "FlowLayout places components left to right"

The bullet point after C should be D. In the book it is A; thus the sequence is : A B C A E

"FileInputStream" now reads: "FileOutputStream"

"triggered when use chooses...." should be: "triggered when user chooses...."

in the first block of handwritten text, the word viewing is spelt incorrectly: ... See if they're currently veiwing a question or answer should be: ... See if they're currently viewing a question or answer

that ships with you Java development kit. should read that ships with your Java development kit.

What's the first foreign country due south of Detroit Michigan? should be ....due north of Detroit Michigan

"PrintWriter acts as it's own bridge" should read: "PrintWriter acts as its own bridge"

"The accept() method blocks (just sits there) while its waiting" should read: "The accept() method blocks (just sits there) while it's waiting"

"We want something to run continusouly..." should be "We want something to run continuously..."

"myThread .start();" should read: "myThread.start();" It works either way, but to be consistent with the way you have used the dot notation throughout this book, the extra space is distracting.

The second line of the very first paragraph refered to an incorrect page number: "...each time we ran it? Look back at page 28..." should be changed to: "...each time we ran it? Look back at page 478..."

class ThreadTester { should be: class ThreadTestDrive { and Runnable theJob = new HelloThread(); should be: Runnable theJob = new MyRunnable();

So, if you don't lock the back account should read So, if you don't lock the bank account

"mport java.io.*;" should read: "import java.io.*;"

before Ryan has a chance to wakes up should be before Ryan has a chance to wake up

"JVM will see that, and immediately look inside it's" should read: "JVM will see that, and immediately look inside its"

To make a Java Web Start app, you to .jnlp should read To make a Java Web Start app, you the .jnlp

<homepage href="index.html/> should read: <homepage href="index.html"/>

"Your client object ge to" should read: "Your client object gets to"

"Remember, must be able to see......" should be: "Remember, rmic must be able to see..."

"rmiregistery using the static" should read: "rmiregistry using the static"

'thing' is coming back from the server as a reuslt of should read 'thing' is coming back from the server as a result of

extra space between y and ou

"response. Imagine a reasonably complext HTML page, and now" should read: "response. Imagine a reasonably complex HTML page, and now"

"intereted" should be "interested"

"do you have anything implements..." should be "do you have anything that implements..."

"Here's the serialized object the Scientific Calculator service registered with me." Suggested improvement: "Here's the serialized object that the Scientific Calculator service registered with me."

Instead of a diagram of the ServiceServer and ServiceServerImpl, there are two diagrams for ServiceServer.

In the definition of the method getGuiPanel() two lines have been truncated: