SCJP 5 - Errata 4/16/06

SCJP Sun Certified Programmer for Java 5 Study Guide (Exam 310-055)
Sierra & Bates
0072253606

page...type......description

..9....clarify...Listener methods must end in "Listener"

.41....typo......2nd declaration s/b: final int recordNumber

.45....x-ref.....Synchronized para. s/b: Chapter 9

.59....x-ref.....Volatile para. s/b: Chapter 9

.74....bug.......Q-2: answers A-D were: public Bark speak()...
& 77...............................s/b: public void speak()...

.94....clarify...code was: private Halter myHalter;
......................s/b: private Halter myHalter = new Halter();

115....clarify...last sentence before exam watch s/b:

If any superclass in its inheritance tree has already provided concrete (i.e., non-abstract) method implementations, then, regardless of whether the superclass declares that it implements the interface, the subclass is under no obligation  to re-implement (override) those methods.

115....bug.......exam watch was: a.doDogStuff();
............................s/b: d.doDogStuff();

133....bug.......3rd row, 2nd column was: class Foo {
.....................................s/b: public class Foo {

174....clarify...line 15 s/b: dog.setName("Aiko");

216....bug.......Starting at 2nd sentence "As we'll cover..." remove that sentence and the code down to the next heading.

233....bug.......In table 3-3, valueOf for Boolean does not throw NFE

234....bug.......1st two S.o.p.'s s/b: ("y = " + y);

236....clarify...Sentence before bullet points s/b: In order to save memory, two instances of the following wrapper objects, created through autoboxing, will always be equal...

236....clarify...Add this sentence: When == is used to compare a primitive to a wrapper object, the wrapper object will be unwrapped to its primitive value, and the comparison will be made between the two primitives' values.

258....clarify...2nd boxing bullet s/b: Using == with wrappers created through autoboxing is tricky; those with small values...

259....clarify...Q-2: code s/b: Short story = 200;
& 266

322....clarify...Near the bottom of the exam watch, sentence s/b: But the only variables that can be assigned (rather than tested against something else) are a boolean or a Boolean; all other...

364....typo......code: doStuff()  s/b:  doStuff();

370....x-ref.....3rd row (IllegalArgumentException) s/b: (This chapter)
.................6th row (NumberFormatException)  s/b: (Chapter 3, "Assignments")

381....bug.......code s/b:

switch(x) {
  case 2: y = 3; break;
  case 3: y = 9; break;
  case 4: y = 27; break;
  default: assert false;  // we're never supposed to get here
}

421....typo...... bottom of page, s/b:  x+= " ocean";

439....bug.......2nd 2. s/b: Create a Writer or a Stream. Specifically, create a FileWriter, a PrintWriter, or a FileOutputStream.

454....bug.......2nd paragraph s/b: ...(unless you implement readObject())...

472....bug......."Finding stuff" bullet, last sentence s/b: We'll use the java.util.regex.Pattern , java.util.regex.Matcher, and java.util.Scanner classes to help us find stuff.

492....bug.......Last paragraph s/b: ...and to deserialize an object invoke readObject().

497....bug.......6th bullet:  was matcher()  s/b: matches()

505....typo......top of page: was: "dir1" and "dir1"
& 517.........................s/b: "dir1" and "dir2"

528....typo......2nd line: moofvalue() s/b: getMoofValue()

538....bug.......In figure, LinkedHashMap s/b a subclass of HashMap

562....bug.......After big code listing, s/b:  ...not predictable: HashSets do not guarantee any ordering.

574....big bug...The top 2/3 of the page uses a HashSet / Set example. It should be using an ArrayList / List example, so replace 10 occurrences of "Set" with "List", and replace 2 occurrences of "HashSet" with "ArrayList".

581....clarify...Exam watch should be: ...even if that Object reference refers to an Integer (or some other wrapper object) on the heap.

620....bug.......Q-16: method declaration s/b:
& 634
         public static <E extends Number> List<E> process(List<E> nums)

631....bug.......A-13, end of answer s/b: are not defined in the Arrays or Collections classes. (Objective 6.5)

669....typo......Answer s/b: A,B,D,E, and F are incorrect

711....x-ref.....item 5 s/b: ...Chapter 6...

752....bug.......Answers 13 & 17: IllegalThreadStateException s/b:
& 757                             IllegalMonitorStateException

783....clarify...Q-4, D. s/b:  D. _A.
& 792

787....bug.......Q-10, This is really a question about java, not javac. 
796 & 797........Change all references from javac to java.