The table is sortable so you can see focus on the errata by criticality, chapter or see the ones added since you last checked. To report a potential error, please create a thread at http://www.coderanch.com/forums/f-117/ocajp

Note: If you got the second printing of this book (late 2016), most of these errata have been corrected.

Page	Chapter #	Error	Type of error	Reported by/via	Confirmed on	Listed on Wiley’s errata	Fixed in 2nd printing*
xxxiv	Intro	#9 – there is a stray “a” after (Choose all that apply)	Typo (e-book only)	Alex	2014-12-171	Yes	Yes
xxxvi	Intro	#12 – choice C aviould read Color: white rather than Color: White	Typo	Chris McDowell	2016-07-22	No	No
xxxvooo	Intro	#17 – choice D should end with 5)); rather than 5);	Typo	Igor Soudakevitch	2016-11-27	Pending	No
xxxix	Intro	#1 – “a_b defaults to a null value” should be “$ defaults to 0”	Error in mock explanation	Mushfiq Mammadov	2015-10-11	Yes	No
xxxix	Intro	#3 – The answer is correct. In the explanation, “Puma is invalid” should be “Cougar is invalid” for the explanation for D. And “E is incorrect” should be “E is correct”. In the second printing, we introduced a regression error. It should be “since the declaration in the parent iass Puma is invalid” and then “the declaration of Puma is invalid”	Error in mock explanation	Alan Couze	2015-08-03	Yes	Partially
xxxix	Intro	#4 – The answer is correct. In the explanation, the first bullet should say “starts” rather than “continues” and the assignment of 1, 2, etc is to count. The complex expression spelled out is y. Also, in the second bullet, 1 + 4 should say 1 + 5.	Error in mock explanation	Elena Felder and Alan Couze	2015-04-04 and 2015-08-03	Yes	Yes
xxxix	Intro	#4 – If you have the second printing, bullet 3 should say (1+4) % 3 and 5 % 3 rather (1+5) % 3 and 4 % 3.	Error in mock explanation	Olivier Ska	2016-11-17	Pending	No
xli	Intro	#10 – “Reference one points to g1” should be “Reference one points to g2”	Error in mock explanation	Mushfiq Mammadov	2015-10-11	Yes	Yes
xli	Intro	#13 – “options D and E are correct” should be “options D and E are incorrect”	Error in mock explanation	Diarmuid Naughton	2015-10-11	Yes	Yes
xli	Intro	#13 – “since the pre-increment operator” should be “since the pre-decrement operator”	Error in mock explanation	Vitaliy Ovcharenk	2017-05-14	TBD	TBD
xli	Intro	#13 – “Since luck is not less than 10” should be “Since luck is not greater than 10”	Error in mock explanation	Ganesh Pateka	2017-11-29	TBD	TBD
xlii	Intro	#16 – The answer is correct. “because an interface may inherit two abstract methods with the same signature” should be “ a class”, not “an interface”. The statement isn’t wrong, but in the question it’s a class.	Error in mock explanation	Elena Felder	2015-04-04	Yes	Yes
xlii	Intro	#17 – The answer is correct. In the second to last sentence, “not inferring predicates” should be “of inferring predicates”	Error in mock explanation	Guram Savinov	2017-10-15	No	No
4	Chapter 1	“each of these five words is in” should be “six words.”	Typo	Kevin Abel	2015-03-xx	Yes	Yes
8	Chapter 1	The stack trace should have “mainmethod.” removed. Also, it should refer to line 4 rather than line 7	Typo	Michel Parisien	2015-12-26	Yes	Yes
10	Chapter 1	In the fourth line of the second paragraph, “From example” should be “For example”.	Typo	Michel Parisien	2015-12-26	Yes	Yes
12	Chapter 1	The import should be java.nio.file.Paths not java.nio.files.Paths.	Typo	Mushfiq Mammadov	2015-03-20	Yes	Yes
18	Chapter 1	The middle code block should have } instead of { on line 5.	Typo	Gabriel Jesus	2015-02-xx	Yes	Yes
21	Chapter 1	In the first sentence, “their size in bytes” should be “their size in bits”	Typo	Bart Presso	2018-01-15	Yes	Yes
30	Chapter 1	The compiler error message at the top of the page should refer to line 7 rather than line 5.	Typo	Michel Parisien	2015-12-26	Yes	Yes
31	Chapter 1	At the end of the second paragraph, “simplest type it can give the value” should be “simplest value it can give the type”	Typo	Michel Parisien	2015-12-26	Yes	Yes
Chapter 1 review questions (e-book only)	Chapter 1	In some of the review questions, the line break is missing between the code that would be in different files. You can assume that each package statement starts a new file.	Rendering error	Tom Keegan	2015-12-26	Pending	No
53	Chapter 2	On the first line of table 2.1, ~ should be in the other unary operators section. And on the last line of the table, !=, should be \|=. (This isn’t on the exam though so don’t worry).	Typo	Steve Aaron	2015-04-02	Yes	Yes
54	Chapter 2	In “resulting in a value of x of 7. Make sure you understand why the result is 24”, the 7 and 24 should be 14	Typo	Edward Rance	2015-02-03	Yes	Yes
54	Chapter 2	In “int x = 2 * ((5 + 3) * 4 – 8); This time you would evaluate the addition operator 10 + 3 “, the 10 should be 5.	Typo	Edward Rance	2015-02-03	Yes	Yes
54	Chapter 2	In the third to last paragraph, “except boolean and String” should be “except boolean” since String is not a primitive	Incorrect fact	Juliet Smith	2015-07-28	Pending	No
55	Chapter 2	In the first paragraph “9 to 12” should be “11 to 12”	Typo	Mike Kenyon	2017-08-11	Pending	No
55	Chapter 2	In the note “floating-point integers” should be “floating-point numbers”	Typo	Olivier Ska	2016-11-17	Pending	No
57	Chapter 2	In the second sentence, “multiplied” should be “divided”.	Typo	Mushfiq Mammadov	2015-07-01	Yes	Yes
58	Chapter 2	In the second to last sentence of the last paragraph, “the value return” should be “the value returned”	Typo	Tia Smith	2017-07-10	No	No
61	Chapter 2	9l should be 9f on the first row	Typo	Mushfiq Mammadov	2015-03-30	Yes	Yes
62	Chapter 2	“The compound operator will first cast x to a long” – “x” should be “y”	Typo	Gabriel Jesus	2015-02-24	Yes	Yes
64	Chapter 2	Figure 2.1 says “true tables” rather than “truth tables”	Typo	Dan	2015-02-xx	Yes	Yes
69	Chapter 2	“block of statement” should be “block of statements”	Typo	Michel Parisien	2015-12-27	Yes	Yes
71	Chapter 2	The first code example shouldn’t have “final” so the ternary operator is equivalent.	Typo	Jan Stückrath	2016-01-19	Yes	Yes
72	Chapter 2	There’s no reason to mention Java 7 in the sidebar about the ternary operator. The behavior hasn’t changed.	Typo	Mathias Bader	2015-04-11	Yes	Yes
73	Chapter 2	“int and Integer” is listed twice in the bulleted list.	Typo	Scott Selikoff	2014-11-xx	Yes	Yes
82	Chapter 2	In the first example on the page, System.out.print(x) should be removed	Typo	Elena Felder	2015-04-04	Yes	Yes
82	Chapter 2	At the bottom of the page, “In the first example, y and z were both long” should be “In the multiple terms example, y and z were both long”	Typo	Gabriel Jesus	2015-02-26	Yes	Yes
83	Chapter 2	Figure 2.8 says “semicolon” rather than “colon” when pointing to a colon	Typo	Dan	2015-02-xx	Yes	Yes
83	Chapter 2	In Figure 2.8, the title should be “enhanced for-each statement” rather than “enhancement for statement”	Typo	Roel De Nijs	2015-04-02	Yes	Yes
86	Chapter 2	In the second for loop example on the page, there should be a comma in the code to match the output.	Typo	Mushfiq Mammadov	2015-04-02	Yes	Yes
87	Chapter 2	The semicolon is missing after x-=2	Typo	Tawanda Douglas Muringani/a>	2017-03-10	TBD	TBD
91	Chapter 2	In table 2.5, the second table header should be “Allows unlabeled break”	Factual	Matt Road	2015-10-02	Yes	Yes
95	Chapter 2 Mock Question	#6 – The code on line 6 should say “Just Right” rather than “Just right”.	Typo	Igor Soudakevitch	2016-11-19	Pending	No
96	Chapter 2 Mock Question	#8 – Answers C & E are duplicates. Conveniently, they are both wrong so this doesn’t affect the answer.	Typo	Mushfiq Mammadov	2015-04-06	Yes	Yes
102	Chapter 3	In the third to last paragraph “of type name” should be “named name”	Typo	Charles O’Leary	2017-05-07	No	No
107	Chapter 3	The type of the second parameter for indexOf() should be an int. Also, the first parameters is an int, not a char. (But on the exam, you’ll only be passed a char.) Note: this was partially correct in the second printing.	Typo	Mushfiq Mammadov	2015-04-08	Yes	Partially
107	Chapter 3	The return type for the substring() methods should be String not int.	Typo	Cedric Georges	2015-03-18	Yes	Yes
108	Chapter 3	The method signatures for toLowerCase() and toUpperCase() are wrong. They do not take a String parameter.	Typo	Mushfiq Mammadov	2015-04-08	Yes	Yes
108	Chapter 3	In the fifth paragraph, “second example in this set throws an exception because the indexes can be backward” should be “can’t”	Typo	Elena Felder	2015-04-04	Yes	Yes
109	Chapter 3	The method signature for equals() takes an Object, rather than a String. This also could use some explanation that on the exam, you’ll only get passed a String even though the method allows anything to be passed in. (As you might guess, if you pass anything that isn’t a String, the method returns false). Similarly, other methods allow any CharSequence, but you only have to know String.	Typo	Mushfiq Mammadov	2015-04-08	Yes	Yes
111	Chapter 3	String result = lowercase.replace(‘a’, ‘A’); incorrectly shows the output as “Animal”. It should be “AnimAl”	Wrong output	Chris Kuyler	2015-01-26	Yes	Yes
111	Chapter 3	In the third paragraph, the sentence that begins with “It also creates” should end with “AnimAl” instead of “Animal”	Wrong output	Tomas Castagnino	2017-05-20	No	No
111	Chapter 3	In the third paragraph, there is a stray quote. “‘C’ should be ‘C’	Typo	Mushfiq Mammadov	2015-04-15	Yes	Yes
115	Chapter 3	On line 6, the comment should have a dash at the end	Typo	Mushfiq Mammadov	2015-07-10	Yes	Yes
118	Chapter 3	In the code example, line 7 should have been t1 == t3. It’s not wrong as is, but not what we intended	Typo	Mushfiq Mammadov	2015-07-06	Yes	Yes
120	Chapter 3	On the first line, “set all the elements” should be “all elements are set”	Typo	Elena Felder	2015-04-04	Yes	Yes
124	Chapter 3	The semi-colon is missing after one import.	Typo	Cedric Georges	2015-03-24	Yes	Yes
124	Chapter 3	Instead of “variable” for length, it should say “field”	Typo	Roel De Nijs	2015-08-01	Yes	Yes
124	Chapter 3	There is a stray “L” at the beginning of the second line of the for loop.	Typo	Chris Kuyler	2015-01-26	Yes	Yes
125	Chapter 3	In the last paragraph, “line 5 searches for the index of 1” should be “line 6”.	Typo	Elena Felder	2015-04-01	Yes	Yes
126	Chapter 3	In the first paragraph, “line 3 (or 4) gave the wrong answer” should be line 7.	Typo	Mushfiq Mammadov	2015-04-15	Yes	No
126	Chapter 3	The second to last sentence of the second to last paragraph should end with “the target is in” rather than “the target it is”	Typo	Igor Soudakevitch	2016-11-19	Pending	No
126	Chapter 3	The type of numbers should be int[] rather than int.	Typo	Cedric Georges	2015-03-24	Yes	Yes
127	Chapter 3	On line 5, “There'” should be “There’s”	Typo	Olivier Ska	2016-11-17	Reported	No
127	Chapter 3	The variable in the last line of code should be “differentSizes” rather than “different size”	Typo	Igor Soudakevitch	2016-11-19	Pending	No
129	Chapter 3	The first import is missing the semicolon.	Typo	Mushfiq Mammadov	2015-04-15	Yes	Yes
136	Chapter 3	In the last paragraph of the Autoboxing section, “outputs 1” should be “outputs [1]	Typo	Mushfiq Mammadov	2015-03-07	Yes	Yes
137	Chapter 3	In the second paragraph, “is also known a backed List” should be “is also known as a backed List”	Typo	Ian Gatenby	2017-03-16	No	No
137	Chapter 3	In the comment on line 26, “UnsupportedOperation Exception” should be “UnsupportedOperationException”	Typo	Philippe De Neve	2017-06-19	No	No
138	Chapter 3	On the sixth line of code the // is missing after the semicolon	Typo	Igor Soudakevitch	2016-11-19	Yes	Yes
139	Chapter 3	In the last paragraph before the callout, “seconds, and nanoseconds” should be “seconds, and milliseconds”	Typo	Mike Kenyon	2017-08-19	No	No
141	Chapter 3	The last method signature is missing the variable name time. (The data type is there though).	Typo	Cedric Georges	2015-03-23	Yes	Yes
141	Chapter 3	In the code example, a semicolon is missing when creating the LocalDate	Typo	Mushfiq Mammadov	2015-03-23	Yes	Yes
142	Chapter 3	In the first paragraph, Calendar was introduce in 1.2, not 1.1.	Typo	Igor Soudakevitch	2016-11-19	Pending	No
143	Chapter 3	In the second to last example, date 2 should be date.	Typo	Mushfiq Mammadov	2015-04-15	Yes	Yes
146	Chapter 3	LocalDateTime has a toEpochSecond() method, not a toEpochTime() method	Wrong API	Cedric Georges	2015-03-28	Yes	Yes
147	Chapter 3	wrong = Period.ofWeeks(7); –> should be replaced with : wrong = Period.ofWeeks(1);	Typo	Cedric Georges	2015-03-23	Yes	Yes
148	Chapter 3	The line with LocalDateTime is missing a line break before the println	Typo	Scott Selikoff	2015-08-28	Yes	Yes
150	Chapter 3	In the dd description, it should say single-digit date rather than month	Typo	Mushfiq Mammadov	2015-04-15	Yes	Yes
168	Chapter 4	In the first paragraph of “Optional Specifiers”, it says “And since it is optional, you can’t have any of them at all.” This should say “And since it is optional, you are allowed to not have any of them at all.” Bad English on our part!	Typo	Elena Felder	2015-04-04	Yes	Yes
170	Chapter 4	the long() method has a stray ] at the end of of it	Typo	Helen Colson	2014-05-15	Yes	Yes
170	Chapter 4	the long() method doesn’t compile both because of the return type and the method name. (A better name for the method would have been better, such as longMethod.)	Typo	Mathias Bader	2014-04-13	Yes	Yes
172	Chapter 4	The first sentence after three lines of code says: “Walk1() is a valid method declaration without an empty method body.” It should be “with”.	Typo	Mathias Bader	2014-04-14	Yes	Yes
172	Chapter 4	public void walk2; should be public void walk2();	Typo	Mushfiq Mammadov	2014-09-04	Yes	Yes
173	Chapter 4	Second line before heading: “Line 20 calls a vararg parameter two parameters” should be “Line 20 calls a vararg method with two parameters.”	Typo	Mathias Bader	2014-04-14	Yes	Yes
178	Chapter 4	In the comment on line 3, “bird” should be “Bird”	Typo	Igor Soudakevitch	2016-11-27	Pending	No
179	Chapter 4	“Bird is not a subclass of Bird” should say “Bird is not a subclass of Goose”	Typo	Jan Stückrath	2016-01-19	Yes	Yes
184	Chapter 4	Line 14 of the code is missing the type. It should be double	Typo	Mushfiq Mammadov	2014-04-21	Yes	Yes
184	Chapter 4	Table 4.3 is incorrect (and confusing.) An instance method or variable can be called using a reference variable from any context. Was trying to convey that you can call a static method from an instance method but not vice versa (when no reference variables are involved)	Confusing/incorrect table	Suresh Regmi	2015-07-24	Yes	Yes
187	Chapter 4	In the big paragraph, the last sentence should say “when static imports shine” rather than “when static interfaces shine”	Typo	Mike Kenyon	2017-08-27	No	No
188	Chapter 4	The last line should read newNumber(num) to be a proper example of pass by value	Typo	Mushfiq Mammadov	2015-04-28	Yes	Yes
191	Chapter 4	In the fourth paragraph, fifth sentence, “numbers” should be “number”	Typo	Mushfiq Mammadov	2015-04-28	Yes	Yes
191	Chapter 4	In the first sentence of the overloading methods section, it should say “same name” not “same signature”	Typo	Mushfiq Mammadov	2015-04-27	Yes	Yes
192	Chapter 4	“everything other than the method signature can vary for overloaded methods”. This should be method name and not method signature.	Typo	Elena Felder	2015-04-04	Yes	Yes
192	Chapter 4	The fly methods that take and int and short should print different things. In particular, the first should print int.	Typo	Mathias Bader	2014-04-14	Yes	Yes
194	Chapter 4	There should be space at the end of both example outputs. In the second paragraph “string object” should be “string object ”. In the second paragraph of “Primitives” section “int long” should be “int long ” and “long long” should be “long long ”. Unfortunately, it is difficult to represent spaces in output, so we should have used a dash or some other visible character.	Typo	Mushfiq Mammadov	2015-04-27	Yes	Yes
199	Chapter 4	“When overloading methods, the method name and parameter list needed to match.” is incorrect. Just the method name needed to match. The whole point is that the parameter list does not match!	Incorrect fact	Elena Felder	2015-04-04	Yes	Yes
203	Chapter 4	In the third sentence “lines 4 and 5 should be “lines 4, 5 and 6” when referring to the static initializer. In the second printing it says lines 5 and 6.	Typo	Mushfiq Mammadov	2014-09-04	Yes	Partially
204	Chapter 4	After “output Torchie”, it should say “Line 6 then outputs 1.” In the second printing, the period is missing	Typo	Steve Aaron	2015-04-02	Yes	Partially
206	Chapter 4	Table 4.5 is incorrect. It is legal (but less common) for a boolean getter to begin with get rather than is. This means that line 14 is just fine as a boolean getter.	Incorrect fact	I Danilov	2015-03-17	Yes	Yes
209	Chapter 4	“that that” has a duplicate word on the seventh line	Typo	Mushfiq Mammadov	2014-09-04	Yes	Yes
210	Chapter 4	The example with line numbers 1-18 should either include the java.util import or not start with line 1.	Missing import	Mushfiq Mammadov	2015-05-01	Yes	Yes
211	Chapter 4	“Java replies” should be “Java relies”.	Typo	Elena Felder	2015-04-04	Yes	Yes
211	Chapter 4	The first code example under Lambda Syntax (canHop) should not have a semi-colon.	Typo	Mushfiq Mammadov	2014-09-04	Yes	Yes
213	Chapter 4	“Lambdas are allowed to access variables” is in the real world scenario twice. The first sentence should be removed.	Typo	Elena Felder	2015-04-04	Yes	Yes
216	Chapter 4	In the summary section, (a -> a.equals(b) has an extra open paren. It should be a-> a.equals(b)	Typo	Mushfiq Mammadov	2015-05-01	Yes	Yes
219	Chapter 4	#7 – ClassRoom should be Classroom. The actual code is correct.	Typo	Elena Felder	2015-04-04	Yes	Yes
219	Chapter 4	#7 – In line 6, there is an extra quote.	Typo	Mathias Bader	2014-04-14	Yes	Yes
222	Chapter 4	#11 – answers D and E should have an extra space at the end	Missing spaces	Mushfiq Mammadov	2015-05-01	Yes	Yes
226	Chapter 4	#19 – In the choice G, the closing } is missing. Give yourself if you got the answer right except for leaving out G.	Typo	Mushfiq Mammadov	2015-05-01	Yes	Yes
229	Chapter 4	#25 – answers A through D should have an extra space at the end	Missing spaces	Mushfiq Mammadov	2015-05-01	Yes	Yes
229	Chapter 4	#25 – 1000L should be 100L. This doesn’t affect the correct answer.	Typo	Mushfiq Mammadov	2015-12-19	Yes	Yes
237	Chapter 5	In the paragraph after the note, the second sentence should not say “can be accessed only by a subclass”. That would be protected, default access.	Incorrect fact	Willyan Silva	2016-02-03	Pending	No
239	Chapter 5	“user” should be “use” in “Notice the user of both super() and super(age)”	Typo	Cedric Georges	2015-05-14	Yes	Yes
241	Chapter 5	In the last sentence of paragraph 2, “Java compile” should be “Java compiler”	Typo	Igor Soudakevitch	2016-11-27	Pending	No
246	Chapter 5	The phrase “a method” is duplicated near the end of the page	Typo	Mushfiq Mammadov	2015-05-10	Yes	Yes
247	Chapter 5	The numbers output should be 50.0 and 70.0, not 50.00 and 70.00	Typo	Mushfiq Mammadov	2015-05-10	Yes	Yes
249	Chapter 5	In “since the signature changes from a no-argument constructor to a constructor”, the word “constructor” should be “method” both times.	Typo	Peter Deak	2016-02-18	Yes	Yes
249	Chapter 5	“the return type void is not a subclass of int” is reversed. Swap int and void in the sentence	Typo	Cedric Georges	2015-05-14	Yes	Yes
249	Chapter 5	In the last paragraph, “on the example” should be “on the exam”	Typo	Jan Stückrath	2016-01-19	Yes	Yes
254	Chapter 5	“Overriding vs. Hiding Methods” section, the second paragraph, the second sentence should refer to super rather than a static method to refer to a superclass method.	Typo	Mushfiq Mammadov	2015-05-14	Yes	Yes
261	Chapter 5	In the first sentence, “brackets” should be “braces”. ({} are braces, [] are brackets)	Typo	Elena Felder	2015-04-04	Yes	Yes
263	Chapter 5	The second to last sentence in the second paragraph should read “The key point is that the first concrete class to extend the abstract class must implement all inherited abstract metthods.	Typo	Bram Vonk	2015-12-15	Yes	Yes
265	Chapter 5	The third rule for abstract classes is incomplete. You aren’t allowed protected abstract classes either. Protected classes aren’t on the exam, but the protected keyword is so a reader might be wondering.	Incomplete statement	Ben Pittens	2016-01-15	Yes	Yes
267	Chapter 5	The fourth rule for interfaces is incorrect. An interface is allowed to (but discouraged) from having the abstract modifier. It’s use is discouraged although you may see it in the cert exam.	Incorrect fact	I Danilov	2015-03-18	Yes	Yes
269	Chapter 5	“using the extend keyword” should be “using the extends keyword”	Typo	Cedric Georges	2015-06-04	Yes	Yes
272	Chapter 5	The second Bear class should have //DOES NOT COMPILE on line 1 as well.	Typo	Mushfiq Mammadov	2015-09-29	Yes	Yes
274	Chapter 5	“The compile will” should be “The compiler will”	Typo	Cedric Georges	2015-06-04	Yes	Yes
276	Chapter 5	At the bottom of the page, “the following class” should say “the following interface”	Typo	Mushfiq Mammadov	2015-09-29	Yes	Yes
285	Chapter 5	At the bottom of the page, the coding “Feeding reptile” should be “Feeding: “	Typo	Mushfiq Mammadov	2015-09-29	Yes	Yes
289	Chapter 5	It would be clearer if “Parent methods and objects can be accessed explicitly using the super keyword.” was “Parent methods and instance variables can be accessed explicitly using the super keyword.”	Typo	Juliet Smith	2015-08-04	Pending	No
290	Chapter 5	The last word on the page should be “ClassCastException” rather than “CastClassException”	Typo	Juliet Smith	2015-08-04	Pending	No
291	Chapter 5	#2 – Choice E should reference line 7, not line 8	Typo	Mushfiq Mammadov	2015-05-15	Yes	Yes
294	Chapter 5	#10 – In choice C, “extend” should be “extends”	Typo	Roel De Nijs	2015-09-29	Yes	Yes
295	Chapter 5	#13 – The { is missing on line 1 of the provided code	Typo	Mushfiq Mammadov	2015-05-15	Yes	Yes
301	Chapter 6	mainmethod.Zoo.main should be Zoo.main and line 7 should be line 4 in the stack trace	Typo	Mushfiq Mammadov	2015-10-06	Reported	No
308	Chapter 6	“The catch block runs and she gets a hug on line 17. Then the try statement is over and the code proceeds on line 21. ” – This misses the fact that finally is run first.	Incorrect fact	Habtamu Abebe	2017-10-28	No	No
312	Chapter 6	The text says the exception is not caught from close(), but it is.	Old text	Cedric Georges	2015-07-26	Reported	No
313	Chapter 6	On the first line “runs after the try block” should be “runs after the catch block”	Typo	Mushfiq Mammadov	2015-10-06	Pending	No
313	Chapter 6	There should be spaces in the before/catch/etc example. Unfortunately, it is difficult to represent spaces in output, so we should have used a dash or some other visible character.	Typo	Saad Benbouzid	2015-07-24	Yes	Yes
314	Chapter 6	In the ClassCastException section, “cast an exception to a subclass” should be “cast an object to a subclass”	Typo	Vince Botteman	2015-06-17	Yes	Yes
316	Chapter 6	The setNumberEggs method should not be static	Typo	Mushfiq Mammadov	2015-10-06	Pending	No
317	Chapter 6	“Common runtime exceptions” should be “Common checked exceptions”	Typo	Vince Botteman	2015-06-17	Yes	Yes
335	Chapter 1 mock explanation	#12 – “If this question were about instance variables, options D and F would be correct”. This should be “options C, D and F would be correct”	Error in mock explanation	Olivier Ska	2016-11-17	Pending	No
335	Chapter 1 mock explanation	#12 – the explanation should end with “0.0f” rather than “0.0”	Error in mock explanation	Guram Savinov	2017-11-14	Pending	No
335	Chapter 1 mock explanation	#14 – The answer is correct. The explanation about case sensitivity applies to why C is wrong rather why B is wrong	Error in mock explanation	Mushfiq Mammadov	2015-03-20	Yes	Yes
338	Chapter 2 mock explanation	#13 – The answer is correct. The explanation should say “b is assigned true on line 5″ instead of “b is assigned true on line 3”.	Error in mock explanation	Shavkat Juraev	2018-02-11	No	No
338	Chapter 2 mock explanation	#14 – The answer is correct. The explanation should say “The value of result is computed by adding 8 to the original value of 4” rather than the other way around.	Error in mock explanation	Steve Aaron	2015-04-02	Yes	Yes
338	Chapter 2 mock explanation	#17 – The answer is correct. The explanation should say “keepGoing remains true” rather than “keep going is false.	Error in mock explanation	Mushfiq Mammadovand Cian Gardiner	2015-04-07	Reported	No
338	Chapter 2 mock answer	#18 – The answer explanation is correct that the answer should be B. It is incorrectly listed as choice A in the answer listing.	Error in mock explanation	Dominik Bauer	2015-04-30	Reported	No
338	Chapter 2 mock explanation	#18 – The first sentence should be “The expression on line 6” rather than “The expression on line 5”	Error in mock explanation	Olivier Ska	2016-11-17	Pending	No
339	Chapter 2 mock explanation	#19 – The answer is correct. The second to last sentence of the explanation should say “6 > 7” rather than “6 < 7”.	Error in mock explanation	Christian Dadulla	2018-02-01	No	No
339	Chapter 3 mock explanation	#2 – The answer is correct. The explanation should say “Line 8 also compares references but is true since both references point to the object from the string pool. Finally, line 9 compares one object from the string pool with one that was explicitly constructed and returns false.”.	Error in mock explanation	Cedric Georges	2015-03-29	Yes	Yes
340	Chapter 3 mock explanation	#4 -abbbaa has an extra b. There should only be two b’s.	Typo	Mushfiq Mammadov	2015-03-23	Yes	Yes
340	Chapter 3 mock explanation	#9 -“Finally, on line 6” should be “Finally, on line 7”	Typo	Charles O’Leary	2017-05-20	No	No
340	Chapter 3 mock explanation	#10 – The answer is correct. The explanation should read “The if statement on line 18 returns true because”.	Error in mock explanation	Cedric Georges	2015-03-29	Yes	Yes
341	Chapter 3 mock explanation	#14 – The answer is correct. The explanation assumes choice B is puzzle.reverse().append(“vaJ$”).substring(0, 4); So while the answer choice for B in the book isn’t what was intended, it is at least still wrong.	Error in mock explanation	Mushfiq Mammadov	2015-04-20	Yes	Yes
341	Chapter 3 mock explanation	#14 – The answer is correct. The explanation should say that length counts from 0, not 1	Error in mock explanation	Roel De Nijs	2015-04-20	Reported	No
342	Chapter 3 mock explanation	#26 – The answer is correct. The explanation should say that the code does compile, not that it doesn’t.	Error in mock explanation	Cedric Georges	2015-03-30	Yes	Yes
344	Chapter 4 mock answers	#9. The correct answer is A, C and E. But if you got C and E, give yourself credit for getting it correct. The chapter text is incorrect on this, but the exam doesn’t cover this edge case. (In fact, it doesn’t cover JavaBeans at all. That is in the book, in case it is added back in).	Error in mock answer	I Danilov	2015-03-17	Yes	Yes
344	Chapter 4 mock explanation	#10, should say “swing ” instead of “swing” (missing space)	Typo	Mushfiq Mammadov	2015-05-01	Yes	Yes
344	Chapter 4 mock explanation	#15 – We autobox to objects so it should say “can be autoboxed to a Boolean” rather than “boolean.” And “autoboxed to a Double” rather than “double”.	Error in mock explanation	Elena Felder	2015-04-04	Yes	Yes
344	Chapter 4 mock explanation	#17 – “pass by reference” should be “pass by value”	Typo	Mushfiq Mammadov	2014-09-04	Yes	Yes
345	Chapter 4 mock explanation	#23 line 4 should say line 12 and line 5 should say line 13	Error in mock explanation	Mushfiq Mammadov	2015-05-01	Yes	Yes
346	Chapter 5 mock explanation	#2 – The answer is correct. The comment about what would happen if the code did compile is incorrect. The code was intended to instantiate a Platypus rather than a Mammal	Error in mock explanation	Paul F.J. Aranas	2015-05-15	Yes	Yes
347	Chapter 5 mock explanation	#3 – CanHope should be CanHop	Typo	Mushfiq Mammadov	2015-05-15	Yes	Yes
347	Chapter 5 mock explanation	#8 – The first sentence should note that that constants are also final in an interface	Typo	Mushfiq Mammadov	2015-09-29	Yes	Yes
348	Chapter 5 mock explanation	#18 – The answer should say that String is not a subclass of int rather than the reverse	Typo	Mushfiq Mammadov	2015-09-29	Yes	Yes
350	Chapter 6 mock explanation	#8 – “try try” should be “the try”	Typo	Mushfiq Mammadov	2015-05-24	Yes	Yes
350	Chapter 6 mock explanation	#9 – there should be space at the end of both example outputs. Unfortunately, it is difficult to represent spaces in output, so we should have used a dash or some other visible character.	Typo	Mushfiq Mammadov	2015-05-24	Reported	No

Online materials:

Online material type	Original error	Type of error	Reported by	Date confirmed	Reported to test vendor	Date fixed
Mock exam 1	A question asks what could be output if an exception is thrown or not in method e(). The answer of D and E is incorrect because choice E is incorrect. Choice E should be abc followed by an Exception. (Which means give yourself credit if you answered D only).	Online practice exam incorrect answer.	Jeanne Boyarsky	2015-04-09	2015-04-20	2015-05-03
Mock exam 1	The question about the String “hello” says if equals() was used, the answer would be A/C/E. This is incorrect. It would be A/C/D.	Online practice exam incorrect explanation	Dominik Bauer	2015-05-31	2015-10-04	not yet
Mock exam 1	On the question asking about which statements are true about extending classes and interfaces, the answer is correct. However the explanation says A is correct and B is incorrect. This is reversed. The graded answer is correct.	Online practice exam incorrect explanation	Maaike Zijderveld	2015-06-22	2015-10-04	not yet
Mock exam 1	The question with the class name StartOfSummer should say 6 rather than Month.JUNE	Online practice exam incorrect question	Saad Benbouzid	2015-08-01	2015-10-04	not yet
Mock exam 1	In “The thing to notice about this example is that soon as x reaches 1, the outer loop will run infinitely.”, it should say “inner loop” rather than “outer loop”	Online practice exam typo in explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	not yet
Mock exam 1	In ShowDate’s answer, line 5 should be line 4 and line 10 should be line 9	Online practice exam typo in explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	not yet
Mock exam 1	In class Supper, IOException, should be java.io.Exception	Online practice exam typo in question	Mushfiq Mammadov	2015-10-11	2016-03-05	not yet
Mock exam 1	In class Deer’s answer, “in the static block”, should be “in the main method”	Online practice exam typo in explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	not yet
Mock exam 1	In the 2468 example, “returns the number 3” should be “returns the number 2”. (The actual answer is correct)	Online practice exam typo in explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	not yet
Mock exam 1	In “import statement of java.util.ArrayList is missing”, “ArrayList” should be “List”	Online practice exam typo in explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	not yet
Mock exam 1	In HindLeg’s explanation, line 7 should be line 8	Online practice exam typo in explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	not yet
Mock exam 1	In Class C’s explanation, line 7 should be line 8	Online practice exam typo in explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	not yet
Mock exam 1	The answer is correct. In the explanation, “”Although Shark does compile” should be “Even if Shark compiled”	Online practice exam incorrect explanation.	João Victor Gomes	2017-05-28	not yet	not yet
Mock exam 2 (reported against exam 3, but I see in exam 2)	One of the questions has “String[] lizards = {“iguana”, “gecko”};”. The answer should be B, not D. Also, there should be a line 9 that actually prints out list.	Online practice exam incorrect answer	Michal Cegielski	2015-04-09	2015-04-20	2015-05-03
Mock exam 2	The question that contains LocalDate d = LocalDate.of(2015, 5); should be LocalDate d = LocalDate.of(2015, 5, 1);. As worded now the answer is E (does not compile) which is not the intent.	Online practice exam incorrect answer	Douglas Dewey Allen	2016-03-05	2015-03-05	TBD
Mock exam 2	LocalDate d = LocalDate.of(2015, 5); should be LocalDate d = LocalDate.of(2015, 5, 7);	Online practice exam incorrect answer	Evgeny Kapinos	2015-06-07	2015-10-04	TBD
Mock exam 2	ArrayIndexOutOfBounds should be ArrayIndexOutOfBoundsException. IOException and NullPointerException have redundant parantheses at the end	Online practice exam incorrect text (cosmetic)	Roel De Nijs	2015-06-07	2015-10-04	TBD
Mock exam 2	The question about StringBuilder and “meow” should have B as the answer, not B&D	Online practice exam incorrect answer	Evgeny Kapinos	2015-06-07	2015-10-04	TBD
Mock exam 2	The question about the 2D array “times” is missing a line break before where line 7 should start.	Online practice exam typo	Saad Benbouzid	2015-08-01	2015-10-04	TBD
Mock exam 2	The question about the 2D array “times” is missing a line break before where line 7 should start.	Online practice exam typo	Saad Benbouzid	2015-08-01	2015-10-04	TBD
Mock exam 2	In the Cardinals class the last call to the constructor is meant to be c3 rather than c2 to match the answer explanation	Typo in mock exam question	Mushfiq Mammadov	2015-10-11	2016-03-05	TBD
Mock exam 2	In the Tiger/Lion example, Tiger should be uppercase in the output in the explanation	Typo in mock exam explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	TBD
Mock exam 2	“since the capacity must be an integer” should be “since the capacity must be an int”	Typo in mock exam explanation	Mushfiq Mammadov	2015-10-11	2016-03-05	TBD
Mock exam 2	The climber class says Strin[] rather than String[]. If you answered that the code didn’t compile, treat your answer as correct	Online practice exam question typo	Maaike Zijderveld	2015-06-22	2015-10-04	not yet
Mock exam 2	In the Koala question, the answer is correct. However for the explanation, “Line 8 compiles without issue since CanClimb is a subclass of Object” should be “Line 8 compiles without issue since an interface can be implemented by a class that subclasses Object”	Online practice exam question typo	Julie Chen	2016-03-20	TBD	not yet
Mock exam 2	In the question about which exceptions actually exist, it turns out IOError does exist in Java. While you don’t need to know this for the exam, we shouldn’t ask about it. Change “IOError” to “InputOutputError” in the question.	Online practice exam question error	Chris McDowell	2016-09-11	TBD	not yet
Mock exam 3	In the “interface methods” question, the explanation should begin with “An interface method may” rather than “An interface may”	Online practice exam question typo	Roel De Nijs	2016-03-20	TBD	not yet
Mock exam 3	One of the questions has “Despite the && false having no effect, the code will still compile and run without issue, so option E is incorrect, as is option F. ” This is from old code and the sentence should be removed. The rest of the explanation and the answer is correct.	Online practice exam incorrect explanation	Jeanne Boyarsky	2015-04-09	2015-04-20	2015-05-03
Mock exam 3	One of the questions has “Finally, we perform modular arithmetic using the new values of x and y—9 and 5, respectively. If we divide these two values we get 0; therefore, the remainder of 9 % 5 is 5, so option A is the correct answer”. This explanation and answer is wrong. First, 9%5 is 4, not 5. Second, choice A should be 4, not 9. Give yourself credit for this one no matter what as the question is just plain wrong.	Online practice exam incorrect answer	Michal Cegielski	2015-04-09	2015-04-20	2015-05-03
Mock exam 3	One of the question has “static final int num;” and asks about the code compiling. As written, the answer is wrong as the code does not compile. (It should be B). The “typo” in the question, is that the final should be removed in this line of code. The intent was to ask about static/class variables rather than knowledge of final.	Online practice exam incorrect answer	Michal Cegielski	2015-04-09	2015-04-20	2015-05-03
Mock exam 3	Online practice exam translated incorrectly in Hello World assembly order question. (Also, the question really should have a closing brace at the end but that’s minor and doesn’t affect answering the question)	Garbled question	Reported by email by Maaike Zijderveld	2015-06-23	2015-06-23	TBD
Mock exam 3	In the 2468 substring example, “Line 6 returns the number 3 since indexes are zero based” should say “Line 6 returns the number 2 since indexes are zero based”	Mock exam explanation typo	Vince Botteman	2015-06-25	2015-10-04	TBD
Mock exam 3	In the LimpException example, D is a correct answer in addition to the ones provided. See link where Vince reported this for why. (I’m requesting this choice be removed because it is harder than what people need to know for the OCA)	Incorrect mock exam answer	Vince Botteman	2015-06-25	2015-10-04	TBD
Mock exam 3	In the pollinate example, answers C, D, E and F should have one less close paren	Typo	Saad Benbouzid	2015-07-24	2015-10-04	TBD
Mock exam 3	In the Insect example, choice E should by line 6 rather than line 7	Typo in mock exam answer	Mushfiq Mammadov	2015-10-11	2015-03-05	TBD
Mock exam 3	” java” should be ” java ” (which option D gives) and “Java ” should be “ava ” (which option F gives).	Typo in mock exam explanation	Mushfiq Mammadov	2015-10-11	2015-03-05	TBD
Mock exam 3	In the Deer/Car question, neither class should be public	Typo in mock exam question	Mushfiq Mammadov	2015-10-11	2015-03-05	TBD
Mock exam 3	In the Sparrow/Bird question, lines 11-13 should be lines 11-12.	Typo in mock exam explanation	Mushfiq Mammadov	2015-10-11	2015-03-05	TBD
Mock exam 3	In the ierie rating question, choices E and F should refer to lines 11 and 12 to match the explanation. (still wrong though so won’t mess up your score!). Also, choice C should be removed. In Eclipse, choice C doesn’t compile, but at the command line it does. We didn’t intend a confusing choice like that.	Typo in mock exam question	Mushfiq Mammadov	2015-10-11	2015-03-05	TBD
Mock exam 3	In the class I example, “i is in scope” should be “ii is in scope” in the third sentence	Typo in mock exam explanation	Mushfiq Mammadov	2015-10-11	2015-03-05	TBD
Mock exam 3	In Class C, choices E and F are duplicate. Pretend choice F isn’t there. (It’s wrong anyway).	Mushfiq Mammadov	Typo	2015-12-19	2015-03-05	TBD
Assessment exam	The question about Class _C (which is #1 in the physical book) uses radio buttons but should use checkboxes (it does say choose all that apply at least)	Wrong answer selection type	Mushfiq Mammadov	2015-05-31	2015-10-04	TBD
Flashcards	A flashcard about optional characters in a lambda omits braces. It does remove the braces in the example code	Online practice exam incorrect answer	Mushfiq Mammadov	2015-05-31	2015-10-04	TBD
Flashcards	A flashcard with b[0] and b[1 omits the closing bracket	Online flashcard typo	Ganzy Bhat	2015-09-05	2015-10-04	TBD
Flashcards	A flashcard asking which classes are final is incorrect. StringBuilder and StringBuffer are final. (You don’t need to know this; you only need to know String is final)	Online flashcard typo	Miguel Callejón	2016-03-08	TBD	TBD
Flashcards	The flashcard asking about number of arrays and references should add text about assuming the reference is instantiated	Online flashcard error	Ganesh Patekar	2017-12-13	TBD	TBD
Chapter 3 test	Answer choice b is abbaccca in the book and abbbaccca online. The book version is correct	#4 – Online practice exam incorrect option	Reported by email by Maaike Zijderveld	2015-06-05	2015-10-04	TBD
Chapter Test 4	#15 – In the explanation, “on line 18 is a short” should be “on line 17 is a short, “autoboxed to a boolean” should be “autoboxed to a Boolean” and “autoboxed to a double” should be “autoboxed to a Double”. (This is right in the print book)	Conversion issue	Jorma Spitz	2016-04-15	TBD	TBD
Chapter Test 5	#5 – Option C is correct should be Option A is correct. (This is right in the print book)	Conversion issue	Mushfiq Mammadov	2015-09-29	2015-10-04	TBD
Chapter Test 5	#10 – “extended with the extends” keyword is missing the the s (this is right in the printed book)	Conversion issue	Mushfiq Mammadov	2015-09-29	2015-10-04	TBD

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