Key links

• OCP/Java SE 8 Programmer II official [1Z0-809] exam page
• Upgrade Java SE 7 to Java SE 8 OCP Programmer [1Z0-810] exam page
• Upgrade to Java SE 8 OCP (Java SE 6 and all prior versions) [1Z0-811] exam page
• Pearson VUE (register for the test) and ID requirements
• Cert View (check your score)
• Through the end of 650016, Oracle is offering 35% off on the exam fee with a discount code.
• Oracle posted sample questions
• How to access the online mock exams

Where to buy it

• Amazon paper  and ebook (Amazon sells the book for less than everyone else)
• Barnes and Noble paper and nook
• Wiley
• Goodreads (links to many book sellers)

Length/score

Oracle has a tendency to change this information from time to time. As of May 22, 2017:

• Length: 2 hours (was 2.5 hours util August 2022)[1Z0-809, 1Z0-810], 130 minutes [1Z0-813]
• # Questions: 68 (was 85 until August 2022) [1Z0-809], 60 [1Z0-810], 60 [1Z0-813]
• Passing score: 65% [1Z0-809, 1Z0-810], 63% [1Z0-813]

Changes to the objectives since the exam was launched

Not an objective, but Oracle made certain objectives about the exam explicit. See this thread for the text. 

Exam affected	When change occurred	Description of change	Impact of Change
1Z0-809 (main OCP 8 exam)	October 2015	The merge() method of the Stream API was removed from the objectives list.	It is still on the upgrade exam. I would recommend learning it anyway for the main exam because it is useful API and they might have left the questions on the exam despite removing the objectives.
1Z0-810 (upgrade exam from Java 7)	November 2015	The merge() method of the Stream API was removed from the objectives list.	It’s still on the upgrade exam for Java 6 or lower, but not for people upgrading from Java 7. I’m guessing this will change shortly. Will update this table when it happens.
1Z0-813(upgrade exam from Java 6 or earlier)	March 2016	“Use collections from the java.util.concurrent package with a focus on the advantages over and differences from the traditional java.util collections” changed to “”Use classes from the java.util.concurrent package including CyclicBarrier and CopyOnWriteArrayList with a focus on the advantages over and differences from the traditional java.util collections”	The new objective is more specific, but still leaves room for other classes to be tested.

Online Materials

• OCP 8 Book: Online Material and Practice Exams
• Table of Contents

Blogs posts related to OCP: Oracle Certified Professional Java SE 8 Programmer II Study Guide: Exam 1Z1-809:

• Announcement of book release
• Report of first printed copy
• Differences between the OCP 8 and two upgrade exams
• Bonus: How to create the Chapter 10 database using derby
• Bonus: Autocommit vs Savepoints
• Updated how to sign up for the practice exams

Errata

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-24/java-programmer-SCJP. Be sure to include “Sybex” and the chapter and/or page number in the subject.

Online materials:

Page	Chapter #	Error	Type of error	Reported by/via	Confirmed on	Listed on Wiley’s errata
xxxix	Assessment	#3 – On line 15, “public void main” should be “public static void main”. As written, none of the answers are correct	Typo	Dominik Bauer	2016-02-18	Pending
xxxix	Assessment	#3 – On line 2, “public class Tail” should be “class Tail.”	Typo	Antonius Sopian	2016-06-01	Pending
xliii	Assessment	#11 – Options C and D should have x-> x++ as the lambdas. The extra > is a typo.	Typo	Juerg Bauman	2018-05-20	Pending
xlv	Assessment	#14 – The RainException class should be static and the import for Scanner should be present	Error in question	Peter Duke	2017-10-15	Pending
xlix	Assessment	#16 – the answer is correct. The explanation reverses what is in variables d and p.	Typo	Mathias Bader	2016-01-24	Pending
xlvii	Assessment	#20 – Choice B has a stray “B” at the beginning of the answers	Rendering error	Guillaume Bailly	2016-02-27	Pending
3	Chapter 1	Missing space between “CatAdmirer.” and “protected” in the first line of the last paragraph, as these should be part of two sentences.	Typo	Scott Selikoff	2015-12-14	Pending
3	Chapter 1	In the code example, “Lynx extends BigCat” should be “Lynx extends cat.BigCat”	Typo	Igor Soudakevitch	2016-12-31	Pending
9	Chapter 1	At the bottom of the page public abstract void feed(); should not have a stray } on that line.	Typo	Guillaume Bailly	2016-02-27	Pending
12	Chapter 1	In the second (middle) code example on the page “boolean b” should be omitted. It still belongs in the third example as that is intended to not compile	Typo	Igor Soudakevitch	2017-01-02	Pending
16	Chapter 1	In the second paragraph, “Line 12 could have been” should be “Line 13 could have been”	Typo	João Victor Gomes	2017-07-18	Pending
17	Chapter 1	At the end of the page, the equals method should check for “instanceof Lion” not “instanceof LionEqualsBuilder”	Typo	Mathias Bader	2016-01-24	Pending
22	Chapter 1	Line 9 in the code example at the bottom of the page should be } } rather than } ]	Typo	Jeanne Boyarsky	2015-12-19	Pending
24	Chapter 1	Near the end of the page “There are four of types” should be “there are four types”	Typo	T Vergilio	2016-02-13	Pending
25	Chapter 1	The fourth bullet should end with “except for static final fields”	Typo	João Victor Gomes	2017-07-29	Pending
28	Chapter 1	The second bullet should end with “except for static final fields”	Typo		2016-11-22	Pending
33	Chapter 1	In the sixth row of the table, “Can access local variables of the enclosing class” should be “Can access local variables of the enclosing method” and the columns saying “”No” should say “N/A”	Typo	Philippe De Neve	2018-11-18	Pending
35	Chapter 1	In the nested classes paragraph, the sentence about local inner classes should say “non-final static members” rather than “static members”	Typo	Igor Soudakevitch	2016-12-31	Pending
35	Chapter 1	In the overriding paragraph, “new or broader exceptions” should be “new or broader checked exceptions”	Typo	Igor Soudakevitch	2016-12-31	Pending
45	Chapter 1	#20: The two println() statements should be print()	Typo	Joris Cools	2016-05-03	Pending
49	Chapter 2	In the first paragraph “overriden method in the Eagle class” should be “overriding method in the Eagle class”	Typo	Layne Patel	2020-04-27	Pending
53	Chapter 2	In the first paragraph of the box, “if a class marked with” should be “if an interface marked with”	Typo	Javid Azimli	2015-12-16	Pending
53	Chapter 2	In the “Defining a Functional Interface” section, “the Sprint class” should be “the Sprint interface” in the paragraph after the code example	Typo	Thomas Campos	2016-07-18	Pending
53	Chapter 2	In the second to last paragraph, “it is recommend” should be “it is recommended”	Typo	Miguel Callejón	2017-03-25	Pending
54	Chapter 2	In the second to last paragraph, “the Dance method” should be “the Dance interface” and “the Crawl method” should be “the Crawl interface”	Typo	Ramya Subraamanian	2016-03-06	Pending
60	Chapter 2	In the sentence before the FromMatchingAnimals code example, “Predicate class should be Predicate interface”	Typo	Igor Soudakevitch	2017-01-06	Pending
61	Chapter 2	“public void main” should be “public static void main”	Typo	Guillaume Bailly	2016-02-27	Pending
65	Chapter 2	In the first code snippet Bird bird = (Fish) bird; should be Bird bird = (Bird) fish;	Typo	Onur Otlu	2016-04-25	Pending
75	Chapter 2	In the second two last paragraph, “Also, using method overloading” should be “Also, using method overriding”. Both are true in this case, but the section is about inheritance.	Incorrect explanation	Guillaume Bailly	2016-01-24	Pending
78	Chapter 2	In the third paragraph, “We also checked the return type” should be “We also checked the return value”	Typo	Donald Colvin	2017-07-15	Pending
80	Chapter 2	At the end of the first paragraph, “it used” should be “it is used”	Typo	Guillaume Bailly	2016-01-24	Pending
81	Chapter 2	In the last paragraph on the page, “such that that” should be “such that”	Typo	Guillaume Bailly	2016-01-24	Pending
83-84	Chapter 2	Two examples are missing a semi colon after the imports	Typo	Vlad Alin	2022-01-29	Pending
86	Chapter 2	On the last line “come in and added” should be “come in and add”	Typo	Guillaume Bailly	2016-02-27	Pending
91	Chapter 2	In the last paragraph, “Food interface” should be “Foot class”	Typo	Igor Soudakevitch	2017-01-06	Pending
95	Chapter 2	#2 – Add “(Pretend the line numbers are comments”)	Error in question	Artem Lovan	2016-09-02	Pending
98	Chapter 2	#10 “What is the result of the following code?” should be “What is the result of the following code assuming each interface is a separate file.”	Typo	Onur Otlu	2016-08-19	Pending
100	Chapter 2	#13 Choice B is missing the word “are” in “variables marked”	Typo	Seb Cano	2016-02-13	Pending
113	Chapter 3	In bullet two “static type” should be “generic type”	Typo	Philippe De Neve	2018-11-18	Pending
113	Chapter 3	On the second line of the real world scenario, “it will helpful” should be “it will be helpful”	Typo	Guillaume Bailly	2016-02-27	Pending
115	Chapter 3	In the last paragraph before the real word scenario, the second to last sentence should end with “with a compiler warning” rather than “with a compiler error”	Typo	Aurelien Gamet	2016-04-10	Pending
116	Chapter 3	One line 7 of the code, “List Unicorn” should be “java.util.List Unicorn”	Typo	Tomas Castagnino	2017-06-10	Pending
120	Chapter 3	In the paragraph after the code snippet, it should say “Line 7 doesn’t compile because we can’t add a Sparrow to List<? extends Bird>” not “List”	Typo	Peter Deak	2016-02-27	Pending
122	Chapter 3	In the “understand generic supertypes” box, the last paragraph has the wrong line numbers. “Line 4” should be “Line 5” and “Line 5” should be “Line 6”	Typo	Guillaume Bailly	2016-01-24	Pending
129	Chapter 3	The second to last paragraph should refer to Chapter 7 rather than Chapter 8	Typo	Seb Cano	2016-02-13	Pending
130	Chapter 3	In table 3.4, the first should have a boolean return type. The sixth row should return E, not void.	Typo	Seb Cano	2016-02-13	Pending
131	Chapter 3	In the first paragraph, “Line 8 requests the element at index 2” should be “Line 8 requests the element at index 0”.	Typo	Aurelien Gamet	2016-04-12	Pending
133	Chapter 3	In the last example on the page, line 3 should say “TreeSet”, not “HashSet”	Typo	Thomas Campos	2016-01-01	Pending
133	Chapter 3	On line 8 of the second example, there should be a comma at the end of the comment	Typo	Marc-André Parent	2017-05-02	Pending
136	Chapter 3	In Table 3.5, the cell in “For queue” on the “push” row should say No. Also, in the line under the table, both references to “push” should be “push and pop”	Factual error	Guillaume Bailly	2016-01-24	Pending
136	Chapter 3	In the last paragraph, “(stack), people say push/poll/peek” should be “(stack), people say push/pop/peek”	Typo	Jan Sterk	2016-05-03	Pending
137	Chapter 3	In Figure 3.7, all references to “queue” should say “stack”	Typo	Thomas Campos	2016-01-01	Pending
137	Chapter 3	In the code on lines 16 and 17 along with i figure 3.7, poll() should be pop(). The output is the same, but a stack uses the pop() method.	Typo	Abdulaziz Akbary	2017-04-17	Pending
139	Chapter 3	In table 3.6, the third to last row should say (Object value) rather than (Object)	Typo	Salim Rahal	2016-08-19	Pending
139	Chapter 3	In table 3.6, “Returns value is in map” should be “Returns whether value is in map”	Typo	Guillaume Bailly	2016-02-27	Pending
145	Chapter 3	In the LegacyDuck example, java.util.Comparable should just be Comparable as it is in the java.lang package. For example, this means line 1 of the examples on page 144 and 145 should be changed to remove “java.util”	Typo	Mike Constantin	2016-01-08	Pending
146	Chapter 3	The statement about natural ordering should clarify that false has to be consistent too	Factual error	Jan Sterk	2016-05-03	Pending
149	Chapter 3	After the bigger code example, “squirrels are from the species” should be “squirrels are from the same species”.	Typo	T Vergilio	2016-01-27	Pending
152	Chapter 3	In the first example, r1.id = r2.id should be r1.id – r2.id	Typo	Ying Zhao	2016-01-08	Pending
154	Chapter 3	On the first line, “string.startsWith” should be “str.startsWith”	Typo	Lukas Machacek	2018-01-05	Pending
154	Chapter 3	In the first sentence of the last paragraph, “as long as long” should be “as long”	Typo	Sander Wamelink	2016-05-19	Pending
157	Chapter 3	In the last sentence change “requested key is found” to “requested key is found and the associated value is not null”	Clarification	Olivier Chalet	2016-05-27	Pending
158	Chapter 3	In the second paragraph, “or is null” should be “or value is null”	Typo	Layne Patel	2020-04-29	Pending
159	Chapter 3	In the last row of table 3.11, the functional interface Function should appear in the computeIfAbsent column and the functional interface BiFunction should appear in the computeIfPresent column	Wrong API	Ying Zhao	2016-01-08	Pending
159	Chapter 3	In table 3.12, the merge column of the first row should say “Update key’s value in map”.	Incorrect fact	Robert Friml and Ramya Subraamanian	2016-02-27	Pending
159	Chapter 3	In table 3.12, the merge column of “null value in map” should say “Set key to value” rather than “Set key to mapping function result”	Incorrect fact	T Vergilio	2016-04-10	Pending
159	Chapter 3	The computeIfAbsent column of row 2 should say “Set key to mapping function result”	Incorrect fact	Olivier Chalet	2016-05-27	Pending
160	Chapter 3	In the bullets for HashSet and HashMap, “hashcode” should be “hashCode”	Typo	Anton Shaikin	2016-02-27	Pending
160	Chapter 3	In the bullet for Hashtable, “hashmap” should be “HashMap”	Typo	Donald Colvin	2017-07-15	Pending
160	Chapter 3	In the last sentence of the second paragraph, “add or remove an item” should be “add an item”	Typo	Olivier Chalet	2016-05-27	Pending
161	Chapter 3	In the second paragraph, “Collection has a few methods” should be “Collections Framework has a few methods.” The idea was to include all the Collections types (Map has merge).	Typo	Anton Shaikin	2016-02-27	Pending
167	Chapter 3	#14 – All the dots in the answer choices should be commas	Typo	Mike Constanti	2016-01-11	Pending
169	Chapter 3 mock question	#21 – The parenthesis should be be removed from all the answers.	Typo	T Vergilio	2016-01-27	Pending
170	Chapter 3	#24 – “prints outs” should be “print out”	Typo	Guillaume Bailly	2016-02-27	Pending
various	Chapter 4	When showing the sample functional interfaces (Supplier, Consumer, BiConsumer, Predicate, BiPredicate, Function, BiFunction, UnaryOperator and BinaryOperator), we have “class” instead of “interface”. (Copy and paste typo error)	Typo	Thomas Campos	2015-12-16	Pending
178	Chapter 4	In the fourth paragraph, “capitalized in eggs” should be “capitalized in egg”	Typo	Nick Robinson	2018-05-20	Pending
181	Chapter 4	In the sentence after the bullet “about your answer is should be “what your answer is”	Typo	Kilian Reisenegger	2016-06-01	Pending
181	Chapter 4	In the third to last paragraph, “Line 6 passes one String parameter” should be “Line 6 passes one List parameter”	Typo	Rustam Alimuradov	2016-03-04	Pending
188	Chapter 4	In “Creating Stream Sources”, line 3 should say “count = 3” rather than “count = 2”	Typo	Javid Azimli	2016-01-17	Pending
191	Chapter 4	In the min/max section, the method signatures should be Comparator<? super T> comparator. The interface name was missing.	Typo	Mihaela Hetea	2016-01-24	Pending
192	Chapter 4	In the paragraph above the note, “On the infinite list” should be “On the infinite stream” and “If we called noneMatch() or allMatch(), they” should be “If we called allMatch(), it”	Typo	Bas Duineveld	2016-03-20	Pending
195	Chapter 4	In the second code example on the page, StringBuilder:append should be StringBuilder::append. A method reference needs two colons.	Typo	T Vergilio	2016-01-28	Pending
195	Chapter 4	“Java provides an interface with common collectors” should be “Java provides a class with common collectors”	Typo	Frenkel Smeijers	2019-15-25	Pending
197	Chapter 4	limit(int maxSize) should be limit(long maxSize) and skip(int n) should be skip(long n)
201	Chapter 4	Two paragraphs before Figure 4.5, “Then we then want them sorted.” should be “Then we want them sorted. “	Typo	Anton Shaikin	2016-03-15	Pending
201	Chapter 4	Two paragraphs before Figure 4.5, “Then we want to first two” should be “Then we want the first two”	Typo	Guillaume Bailly	2016-01-31	Pending
201	Chapter 4	The formatted code block that begins with “stream.filter” should begin with “list.stream().filter”	Typo	Tomas Castagnin	2017-06-23	Pending
203	Chapter 4	“The source is an infinite stream of odd numbers” should be “The source is an infinite stream of numbers”	Typo	Mihaela Hetea	2016-01-24	Pending
203	Chapter 4	The second to last sentence should end with “allows its second element” rather than “prevents its second element”	Typo	Nick Robinson	2018-05-27	Pending
208	Chapter 4	In the second pargraph, “this function that takes an Object’ should have be “this function takes an Object”	Typo	Nick Robinson	2018-05-20	Pending
209	Chapter 4	In table 4.8, the last row should say average() instead of avg(). Also the paragraph preceding the table should have the same change.	Typo	Thomas Campos	2015-12-16	Pending
210	Chapter 4	In the second sentence of the last paragraph, “size” should be “sum”.	Typo	Onur Otlu	2016-12-31	Pending
212	Chapter 4	The top of the page should say Table 4.9 is continued rather than 4.10	Rendering error	Javid Azimli	2016-02-03	Pending
213	Chapter 4	The fill in the blank example, “The only functional interface meeting all three of those criteria is DoubleToIntFunction” is not true. It should say “DoubleToIntFunction and ToIntFunction meet all three of these criteria. As does “ToIntFunction”	Incomplete fact	Peter Deak	2016-02-27	Pending
215	Chapter 4	In paragraph 2, “The filter than returns” should be “The filter then returns”	Typo	Guillaume Bailly	2016-01-31	Pending
218	Chapter 4	In the first sentence of the third to last paragraph, “Collector class” should be “Collector interface”	Typo	Olivier Chalet	2016-05-27	Pending
219	Chapter 4	In the first code example, filter(s -> s.startsWith(“t”) should be filter(s -> s.startsWith(“t”)). The close paren was missing.	Typo	T Vergilio	2016-01-28	Pending
219	Chapter 4	In the third paragraph, “implement of Set” should be “implementation of set”	Typo	Nick Robinson	2018-02-11	Pending
220	Chapter 4	The stack trace at the top of the page should say “Duplicate key 5” instead of “Duplicate key lions”	Typo	Jorge Ruiz-Aquino	2017-10-15	Pending
220	Chapter 4	At the end of the page, “class. java.util” should be “class java.util”	Change in behavior	Tim Moroz	2016-07-16	Pending
223	Chapter 4	The minBy example used to compile with earlier versions of Java 8, but no longer does.	Change in behavior	Mihaela Hetea	2016-01-31	Pending
223	Chapter 4	In the summary, “BiConsumer<T>” should be “BiConsumer<T,U>” and “BiPredicate<T>” should be “BiPredicate<T,U>”	Change in behavior	Marc-André Parent	2017-05-01	Pending
224	Chapter 4	In the first paragraph, “ifPresent()” should be “isPresent()”. Also in the second paragraph of exam essentials, “ifPresent” should be “isPresent”. While there is an ifPresent method, it takes a functional interface	Typo	T Vergilio	2016-01-28	Pending
224	Chapter 4	In the second paragraph getDouble() should be getAsDouble(), getInt(), should be getAsInt() and getLong() should be getAsLong.	Typo	Robert Frimi	2016-02-29	Pending
224	Chapter 4	In the second paragraph “DoubleSupplier, IntSupplier and LongSupplier” should be “OptionalDouble, OptionalInt and OptionalLong”.	Typo	Anton Shaikin	2016-03-18	Pending
224	Chapter 4	In the second sentence of the third paragraph, “they have range” should be “IntStream and LongStream have range”	Typo	Joel Fuhrmann	2017-07-01	Pending
225	Chapter 4	In “The flatmap() method flattens nested lists into a single level and removes empty lists”, both references to “lists” should be “streams”.	Typo	Aurelien Gamet	2016-04-15	Pending
227	Chapter 4	#4 – Answer D should say “after calling” rather than “after the calling”	Typo	A Wellner	2018-11-18	Pending
227	Chapter 4	#5 – “Stream class” should be “Stream interface”	Typo	T Vergilio	2016-01-28	Pending
228	Chapter 4	#9 – Options C and D should have a semicolon at the end. (Give yourself credit f you got the answer right other than D)	Typo	Nick Robinson	2018-05-27	Pending
240	Chapter 5	The second code block is missing a semicolon	Typo	Vlad Alin	2022-04-30	Pending
232	Chapter 5	#20 – Option C should be i->i not 1->i	Typo	Javid Azimli	2016-07-23	Pending
240	Chapter 5	The second code block is missing a semicolon	Typo	Vlad Alin	2022-04-30	Pending
246	Chapter 5	Figure 5.1 got messed up in re-rendering. The code is supposed to say System.out.println(Period.of(1,2,3));	Rendering error	Scott Selikoff	2015-12-17	Pending
248	Chapter 5	In the first sentence of the second paragraph, “Duration doesn’t have a constructor” should be “Duration doesn’t have a factory method”	Typo	T Vergilio	2016-04-10	Pending
249	Chapter 5	UnsupportedTemporalException should be UnsupportedTemporalTypeException in both code snippets	Typo	T Vergilio	2016-02-16	Pending
251	Chapter 5	In the first sentence, it should say “1:00 a.m. – 1:59 a.m.” rather than “2:00 a.m. – 2:59 a.m.” (the diagram on the previous page is correct)	Typo	John Schubert	2017-12-13	Pending
252	Chapter 5	“we really do move back only one hour at a time” should be “we really do move forward only one hour at a time”	Typo	Vlad Alin	2022-04-30	Pending
255	Chapter 5	In the second sentence after the code example, “a-bc” should be “a-bcde”	Incorrect explanation	Guillaume Bailly	2016-01-31	Pending
260	Chapter 5	In the first paragraph, “retrieve the right resource bundle” should be “retrieve the right string from the resource bundle””	Typo	Donald Colvin	2017-07-18	Pending
261	Chapter 5	The line “name Vancouver Zoo” should be removed from near the bottom of the page	Typo	Onur Otlu	2016-11-05	Pending
263	Chapter 5	In the paragraph after the code block, “before the name of the class” should be “before the base name”	Typo	Ramya Subraamanian	2016-03-21	Pending
265	Chapter 5	In the list on top of the page, #1 and 2 should be reversed with #3 and 4. The requested locale when getting the bundle goes before the default locale.	Typo	Scott Selikoff	2015-12-17	Pending
265	Chapter 5	In the first paragraph, “start searching the bundles starting with step 6 in Table 5.7” should read starting with step 5 since that is where the default locale options start..	Typo	Jeanne Boyarsky	2015-12-17	Pending
265	Chapter 5	For more details about table 5.8, see this thread. In particular the second row of table 5.8 is incorrect and explanation is missing.	Incorrect fact	Olivier Chalet and Onur Ontu	2016-05-27	Pending
271	Chapter 5	In Table 5.10, the second to last row should begin with ofLocalizedDateTime rather than OfLocalizedDateTime	Typo	Sander Wamelink	2016-05-20	Pending
272	Chapter 5	Before the list of symbols (MMMM etc), “not expected to memorize what the different numbers of each symbol mean” should be “not expected to memorize what every part of the format means”	Typo	T Vergilio	2016-01-31	Pending
280	Chapter 5 mock question	#14: the last line of code should say date rather than date4	Typo	Scott Selikoff	2015-12-17	Pending
280	Chapter 5 mock question	#14: Should say “Choose all that apply”	Typo	Scott Selikoff	2015-12-17	Pending
282	Chapter 5 mock question	#18: Choice A should have the missing closing parenthesis	Typo	T Vergilio	2016-01-31	Pending
287	Chapter 6	In table 6.2, the second row should point to Chapter 8 (or Chapters 8 and 9)	Typo	Scott Selikoff	2015-12-18	Pending
287	Chapter 6	In Table 6.3, the second row should refer to Chapter 5 rather than Chapter 3	Typo	Nick Robinson	2018-02-11	Pending
296	Chapter 6	The second bullet should refer to line 14 rather than line 15	Typo	Scott Selikoff	2015-12-18	Pending
298	Chapter 6	In Figure 6.5, the comment in the catch block should say “exception handler”	Typo	T Vergilio	2016-01-28	Pending
301	Chapter 6	“can called be” should be “can be called”	Typo	Guillaume Bailly	2016-01-31	Pending
302	Chapter 6	In the last sentence of the real world scenario “implementing AutoClosable” should be “extending AutoClosable”	Typo	T Vergilio	2016-02-18	Pending
various	Chapter 6	DateTimeException and DateTimeParseException are not checked exceptions. Pretend they are for the purposes of this chapter as the examples misuse it.	Incorrect fact	Guillaume Bailly	2016-02-27	Pending
306	Chapter 6	In the third paragraph, “but really only a limited set” should be “but really only mean a limited set”	Typo	Peter Deak	2016-02-27	Pending
307	Chapter 6	The { at the end of the line for parseData() in the middle of the page should be removed	Typo	T Vergilio	2016-01-31	Pending
309	Chapter 6	Assertions.java:7 should be Assertions.java:4 in the example on the middle of the page.	Typo	Zita Farkas	2016-06-08	Pending
312	Chapter 6	The stack trace should refer to TestSeasons rather than TestSeason	Typo	Philippe De Neve	2018-11-18	Pending
312	Chapter 6	The case study should only contain the first two paragraphs and code in between. “The following example” part should be part of the main text.	Rendering error/formatting	Scott Selikoff	2015-12-21	Pending
312	Chapter 6	In the second line of the stack trace, it should say “test” instead of “main”	Typo	Guillaume Bailly	2016-01-31	Pending
314	Chapter 6	In the last sentence of the third summary paragraph, “expression is effectively final” should be “expression is implicitly final”	Incorrect fact	T Vergilio	2016-02-18	Pending
314	Chapter 6	In the last sentence, -enableassertin should be -enableassertions	Typo	Layne Patel	2020-04-29	Pending
319	Chapter 6 Mock question	#9 – “when the number is negative” should be “when the number is positive” in the question	Inverted question	T Vergilio	2016-01-31	Pending
various	Chapter 7	The Future interface is referred to as the Future class on multiple occasions	Typo	Ramya Subraamanian	2016-03-26	Pending
337	Chapter 7	In the real word scenario, “ExecutorService interface does not implement AutoCloseable” should be “ExecutorService interface does not extend AutoCloseable”	Typo	Brecht Geeraert	2019-08-21	Pending
339	Chapter 7	In the invokeAll() row of table7.2, “as a Collection of Future” should be “as a List of Future”	Typo	Ramya Subraamanian	2016-04-10	Pending
340	Chapter 7	In the second row and second column of Table 7.3, “completely” should be “completed”	Typo	Olivier Chalet	2016-05-27	Pending
340	Chapter 7	In Table 7.3, cancel() should have a boolean parameter for whether you may interrupt it while running	Typo	Mihaela Hetea	2016-02-06	Pending
343	Chapter 7	The main method on line 4 should declare throws IOException	Typo	Prateek Shaw	2017-05-06	Pending
346	Chapter 7	In the second paragraph, “that returns the delay set when the process was created” should be “that returns the remaining delay”	Typo	Philippe De Neve	2018-11-18	Pending
346-347	Chapter 7	In Table 7.5, “scheduleAtFixedDelay” should be “scheduleWithFixedDelay”. This same errors exists in the description on the following page	Typo	Mihaela Hetea	2016-02-06	Pending
347	Chapter 7	In two locations TimeUnit.MINUTE should be TimeUnit.MINUTES	Typo	Tim Moroz	2016-07-31	Pending
348	Chapter 7	“an available thread to become available” should be “a thread to become available”	Typo	Guillaume Bailly	2016-02-27	Pending
349	Chapter 7	TimeUnit.MINUTE should be TimeUnit.MINUTES in the example near the middle of the page	Typo	Miguel Callejónz	2017-05-01	Pending
352	Chapter 7	In the first sentence “before ones that started later” should be “before ones that started later”	Typo	Olivier Chalet	2016-05-27	Pending
352	Chapter 7	In figure 7.4, the arrows are pointing the wrong way for “Reads sheepCount as 2” and “Writes sheepCount as 3”	Rendering error	Scott Selikoff	2016-12-23	Pending
353	Chapter 7	In table 7.8, the header should be “Method Name” rather than “Class Name”	Typo	Salim Rahal	2016-08-19	Pending
359	Chapter 7	In the second to last paragraph “iterator keyset()” should be “iterator keySet()”	Typo	Miguel Callejónz	2017-05-01	Pending
361	Chapter 7	In the third paragraph, “ensure that object” should be “ensure that an object”	Typo	Nick Robinson	2018-05-27	Pending
365	Chapter 7	On the third line of the page, “These methods, defined in the Collections class, contain synchronized methods that operate” should be “These synchronized methods are defined in the Collections class and operate”	Typo	Guillaume Bailly	2016-02-27	Pending
368	Chapter 7	In the last paragraph in the box, “stream operations that occur before/after” should be “stream operations that occur before”	Incorrect fact	Guillaume Bailly	2016-02-27	Pending
371	Chapter 7	In the middle of the page, “Let’s take a look an example” should be “Let’s take a look at an example”	Typo	Guillaume Bailly	2016-02-27	Pending
372	Chapter 7	In the second paragraph, “It strongly recommended” should be “It is strongly recommended”	Typo	Guillaume Bailly	2016-02-27	Pending
373	Chapter 7	In the last paragraph, “Recall that first” should be “Recall that the first”	Typo	Nick Robinson	2018-05-20	Pending
374	Chapter 7	At the top of the page c and s1 should be reversed. The code happens to work as is, but it is unclear	Typo	Guillaume Bailly	2016-02-27	Pending
375	Chapter 7	The section header “Combing results with collect()” should be “Combining results with collect()”	Typo	Guillaume Bailly	2016-02-27	Pending
377	Chapter 7	In the first sentence in the callout box, “in a parallel” should be “in parallel”	Typo	Nick Robinson	2018-05-20	Pending
377	Chapter 7	In the second sentence of the last paragraph, “needs to emptied” should be “needs to be emptied”	Typo	Teo Rajkumar	2016-03-15	Pending
382	Chapter 7	At the bottom of the page “implement the ForkJoinTask interface” should be “extend ForkJoinTask”	Typo	Guillaume Bailly	2016-02-27	Pending
384	Chapter 7	Middle of the page in code section, “ForkJoinPool pool pool = new ForkJoinPool();” has “pool” printed twice. Should be “ForkJoinPool pool = new ForkJoinPool();” instead.	Typo	Oscar Utbult	2016-03-02	Pending
386	Chapter 7	Middle of the page in code section, “ForkJoinPool pool pool = new ForkJoinPool();” has “pool” printed twice. Should be “ForkJoinPool pool = new ForkJoinPool();” instead.	Typo	Oscar Utbult	2016-03-02	Pending
390	Chapter 7	At the bottom of the page, “is often very difficult issue” should be “is often a very difficult issue”	Typo	Guillaume Bailly	2016-02-27	Pending
393	Chapter 7	In the fourth section” “ConncurrentDeque” should be “ConcurrentLinkedDeque”	Typo	T Vergilio	2016-04-10	Pending
396	Chapter 7	#9: “implements the ForkJoinTask interface” should say “extends the ForkJoinTask class”	Typo	T Vergilio	2016-02-02	Pending
397	Chapter 7	#9: Choice D contains a typo and doesn’t make sense as written. It should say “The code produces an infinite loop at runtime not the code produces a ForkJoinPool at runtime.	Typo	Scott Selikoff	2015-12-22	Pending
397	Chapter 7	#9: The cast to integer is missing on pool.invoke()	Typo	Vlad Alin	2023-03-04	Pending
402	Chapter 7	#19 – In choice D, “lock locks” should be “locks”	Typo	Guillaume Bailly	2016-02-07	Pending
404	Chapter 7	Option F is correct, but explanation indicates if line execute() was changed to submit() then Answer Option C would be correct. For this to be correct, the lambda for the executor service should be changed to: () -> {counter++;}	Typo	Tyoma Sakurakoji	2018-01-21	Pending
406	Chapter 8	In the second to last paragraph, the first sentence should begin with “A file is a record” rather than “A file is record”.	Typo	Seb Cano	2016-02-03	Pending
Various	Chapter 8	Ignore the references to format being in chapter 5. You do not need to know String formatting on the exam.	Old text	Seb Cano	2016-02-20	Pending
408	Chapter 8	On the first like “with String containing” should be “with a String containing”	Typo	Donald Colvin	2017-07-21	Pending
408	Chapter 8	In the third sentence, “working directory to file or directory” should be “working directory to the file or directory”	Typo	Olivier Chalet	2016-05-27	Pending
410	Chapter 8	In the code example on the top of the page, the lines for “Is Directory” and “Parent Path” should be reversed to be consistent with the output	Typo	Tim Moroz	2016-05-27	Pending
414	Chapter 8	In the line before the code snippet, “FileWriter and BufferedWriter” should be “FileReader and BufferedReader”	Typo	Guillaume Bailly	2016-02-27	Pending
420	Chapter 8	In the example, the third line is.skip(2) is missing a semi-colon	Typo	Onur Otlu	2016-11-22	Pending
421	Chapter 8	In the second to last sentence of the second paragraph, “how many bytes can be read” should be “how many bytes were read”	Typo	Rustam Alimuradov	2016-03-04	Pending
421	Chapter 8	In the last paragraph, “will be overridden” should be “will be overwritten”	Typo	Donald Colvin	2017-07-22	Pending
422	Chapter 8	In the fourth paragraph, “if the value returned is 0” should be “if the value returned is -1”	Typo	Anton Shaikin	2016-05-19	Pending
425	Chapter 8	In the last sentence of the third paragraph, “to the all of the” should be “to all of the”	Typo	Olivier Chalet	2016-05-27	Pending
427	Chapter 8	In the last paragraph before the callout box, last sentence, ‘it will be need’ should be ‘it will need’	Typo	Marc-André Parent	2017-11-04	Pending
430	Chapter 8	In the second sentence, ‘list data into memory’ should be ‘ list data in memory’	Typo	Marc-André Parent	2017-11-04	Pending
441	Chapter 8	In the first paragraph, console.read() should be console.reader()	Typo	Seb Cano	2016-02-03	Pending
442	Chapter 8	In the line before the summary, “Array.fill” should be “Arrays.fill”	Typo	Guillaume Bailly	2016-02-27	Pending
447	Chapter 8	#10 – Remove the line numbers of the method.	Typo	Tyoma Sakurakoji	2019-01-27	Pending
various	Chapter 9	You don’t need to know this for the exam, but read this about Windows differences and the uri/http protocols if you are curious.	Windows testing	Mihaela Hetea	2016-02-04	Pending
456	Chapter 9	On the last line “java.nio.files” should be “java.nio.file”.	Typo	Seb Cano	2016-02-02	Pending
457 and others	Chapter 9	Paths.getPath() should be Paths.get(). This error occurs a few times in the chapter.	Typo	Seb Cano	2016-02-02	Pending
457-459	Chapter 9	All instances of “zoodirector” should be “zoodirectory”	Typo	Guillaume Bailly	2016-02-27	Pending
457	Chapter 9	In the last paragraph, System.getProperty(“path.separator”) should be System.getProperty(“file.separator”)	Incorrect fact	Peter Fodor	2016-05-29	Pending
458	Chapter 9	c:/zoo-info should be c:/zooinfo	Typo	Philippe De Neve	2018-11-18	Pending
458	Chapter 9	At the bottom of the page, the example might throwan exception depending on your operating system	Windows testing	Peter Deak	2016-02-27	Pending
459	Chapter 9	Path.getPath() should be Paths.get() in the first line of the Accessing the Underlying FileSystem object section	Typo	Seb Cano	2016-02-02	Pending
461	Chapter 9	In the third column of the last row of table 9.1, “Method using” should be “Methods using”	Typo	T Vergilio	2016-04-10	Pending
465	Chapter 9	At the bottom of the page, the last sentence is incorrect. You do not get a new Path object. You get the same path object	Incorrect fact	Guillaume Bailly	2016-02-27	Pending
468	Chapter 9	In the box, Path1.relativize(path3) should be path1.relativize(path2)	Typo	Guillaume Bailly	2016-02-27	Pending
469	Chapter 9	In the second to last paragraph, “normalize(Path)” should be “normalize”	Incorrect fact	Juerg Bauman	2016-02-27	Pending
469	Chapter 9	On the line before “Cleaning up a Path with normalize()”, “a copy of path2” should be “path2”	Incorrect fact	Guillaume Bailly	2017-11-30	Pending
470	Chapter 9	On the line before “Checking for File Existence with toRealPath()”, “exactly exist” should be “actually exist”	Typo	Guillaume Bailly	2016-02-27	Pending
470	Chapter 9	On the first line of the Checking for File Existence section, “toRealPath(Path)” should be “toRealPath()”	Typo	Seb Cano	2016-02-02	Pending
472	Chapter 9	in the first sentence of the third paragraph,’equal()’ should be ‘equals()’	Typo	Marc-André Parent	2017-11-04	Pending
473	Chapter 9	In the second to last paragraph, /bison/pasture should be /bison/field/pasture	Typo	Guillaume Bailly	2016-02-07	Pending
475	Chapter 9	In the code example, the line immediately above the catch statement should say addresses2.txt rather than addresses.txt	Inverted question	T Vergilio	2016-01-31	Pending
475	Chapter 9	In the third paragraph, the statement about move() following symbolic links is incorrect	Incorrect fact	A Wellner	2016-01-31	Pending
475	Chapter 9	In the third paragraph, NOFOLLOW_LINKS should be removed	Incorrect fact	Juerg Bauman	2018-05-20	Pending
475	Chapter 9	In second to last paragraph, “a symbol link” should be “a symbolic link”	Typo	T Vergilio	2016-04-10	Pending
475	Chapter 9	In the third sentence of the second to last paragraph, “throw the runtime” should be “throw”	Typo	Olivier Chalet	2016-05-27	Pending
476	Chapter 9	In the second paragraph, “deletes the features.txt file” should be “deletes the feathers.txt file	Typo	Salim Rahal	2016-08-19	Pending
478	Chapter 9	In the first sentence “String array” should be “String list”	Typo	Layne Patel	2020-04-29	Pending
479	Chapter 9	In the sentence under Table 9.3, isRegular() should be isRegularFile()	Typo	Sander Wamelink	2016-06-01	Pending
480	Chapter 9	In the second to last paragraph, “necessary” should be “necessarily”	Typo	Guillaume Bailly	2016-02-07	Pending
482	Chapter 9	“food.jpeg” should be “food.jpg”	Typo	Donald Colvin	2017-07-29	Pending
484	Chapter 9	In the fourth paragraph, only readAttributes() throws an exception.	Incorrect fact	Tim Moroz	2018-08-27	Pending
483	Chapter 9	BasicFileAttributes, DosFileAttibutes, PosixAttributes and their respective view-classes should say “interface” instead of “class”	Typo	Juan Pablo Barale	2016-08-25	Pending
Various	Chapter 9	Question 3: Pretend this code has the missing imports	Typo	Melvin Hazeleger	2017-12-30	Pending
486	Chapter 9	In the second paragraph, “files in the future” should be “files in the directory”	Typo	Donald Colvin	2017-07-29	Pending
489	Chapter 9	At the bottom of the page, “can be stopped” should be “can be stored”	Typo	Seb Cano	2016-02-02	Pending
491	Chapter 9	In the second to last paragraph, “returned a list of File objects” should be “returned an array of File objects”	Typo	Guillaume Bailly	2016-02-07	Pending
495	Chapter 9	In the first bullet of Exam Essentials Paths.getPath() should be Paths.get()	Typo	Yevhenii Tymoshenko	2016-08-03	Pending
497	Chapter 9	Question 3: Pretend this code has the missing imports	Typo	Melvin Hazeleger	2017-12-30	Pending
500	Chapter 9	#10 – Option E should say “of monkey.txt” instead of “of the monkey.txt”. This is just an extra word and does not affect the answer.	Typo	Donald Colvin	2017-07-29	Pending
500	Chapter 9	#12 – Choice G should be Paths.get() rather than Paths.getPath(). If you chose Choice G as an answer give yourself credit.	Typo	Seb Cano	2016-02-02	Pending
507	Chapter 10	The last three bullets are intended to be separate paragraphs	Rendering error	Guillaume Bailly	2016-02-27	Pending
various	Chapter 10	Everyplace that says META-INF/service should be META-INF/services	Typo	Guillaume Bailly	2016-02-27	Pending
510	Chapter 10	The sample code to load the database is incorrect; see the online blog post with this code.	Error	Jeanne Boyarsky	2017-05-13	Pending
511	Chapter 10	Fo update and delete it should say “zero or more rows” rather than “one or more rows”	Error	Juerg Bauman	2018-01-02	Pending
516	Chapter 10	In the folder structure at the bottom of the page, the -java.sql.Driver line should be indented further.	Rendering error	Guillaume Bailly	2016-02-29	Pending
520	Chapter 10	In table 10.3, the rows are reversed. The cells in the first row go with updatable and vice versa.	Incorrect fact	Thomas Campos	2015-12-22	Pending
525	Chapter 10	The last query on the page should be “select count(*) as count from animal” rather than “select count(*) from animal”. You don’t need to know SQL on the exam though.	Typo	Olivier Chalet	2016-05-27	Pending
various	Chapter 10	In various places, getTimeStamp should be getTimestamp and java.sql.TimeStamp should be java.sql.Timestamp	Typo	Olivier Chalet	2016-05-27	Pending
535	Chapter 10	Line 14 of the code example is missing an open quote.	Incorrect explanation	Guillaume Bailly	2016-02-10	Pending
535	Chapter 10	In the last example on the page ” jdbc should be “jdbc. The extra space after the quote is a typo. Additionally on the following line the quote after url could not be there.	Typo	Marc-André Parent]	2017-11-04	Pending
539	Chapter 10	In #4, E should be “services”, not “service”.	Typo/td>	Vlad Alin	2023-06-03	Pending
543	Chapter 10	#15: getTimeStamp should be getTimestamp	Typo	Vlad Alin	2023-06-03	Pending
543	Chapter 10	#15: The code is missing: Rendering error dropped the code. It’s in the online materials, but not the printed book. See the reported by link for the correct code. (It’s the standard loop through a ResultSet code so you aren’t missing much)	Rendering error	Seb Cano	2016-01-05	Pending
543	Chapter 10	#17: The question should say “Choose all that apply”	Typo	Seb Cano	2016-02-27	Pending
544	Chapter 10	#18: The SQL should say “order by name” rather than “order by id”	Typo	Scott Selikoff	2015-12-22	Pending
545	Chapter 10	#20: The close parens and { are missing in the try block. This doesn’t affect the correct answer to the question.	Typo	Vinod Pothuru	2016-05-30	Pending
549	Chapter 1 mock explanation	#19: The answer is correct. The reason why D is wrong is incorrect. It does not compile because a static method cannot hide an instance method	Incorrect fact	Guillaume Bailly	2016-01-18	Pending
551	Chapter 2 mock explanation	#7: “as adding settings” should be “as adding setters”	Typo	Juerg Bauman	2017-12-14	Pending
552	Chapter 2 mock explanation	#13: While option D is incorrect, the reason should be ignored	Typo	Vlad Aline	2017-12-14	Pending
553	Chapter 3 mock answer	#2: The correct answer is D, not E. The explanation is correct. The answer is wrong.	Typo	Mike Constanti	2016-01-11	Pending
553	Chapter 3 mock answer	#2: The correct answer is D, not E. The explanation is correct. The answer is wrong.	Typo	Mike Constanti	2016-01-11	Pending
553	Chapter 3	#3 should say lines 3 through 6 instead of 3 through 7 in the explanatiohn	Vlad Alin	2022-01-29	Pending
554	Chapter 3	#8 The answer is correct. In the explanation, “greater than” should be “greater than or equals” and “is larger” should be “is equal to or larger”	Incorrect explanation	Piotr Błądek	2016-08-10	Pending
556	Chapter 4 mock explanation	#4: The answer is correct. In the explanation, “Options C and F are true” should be “Options C and D are true” because there is no Option F	Typo	Guillaume Bailly	2016-01-31	Pending
557	Chapter 4 mock answer	#12: If you answered E, give yourself credit as well.	Wrong answer	Mikhail Saltyshev	2021-01-23	Pending
557	Chapter 4 mock explanation	#14:The answer is correct. In the explanation, line 5 uses unboxing, not autoboxing. Also, it would be clearer if the example used an IntStream rather than Stream. Finally, you need to call mapToObj() rather than cast to make it compile	Typo	Guillaume Bailly and T Vergilio	2016-01-31	Pending
561	Chapter 6 mock explanation	#13 “effectively final” should be “implicitly final”	Incorrect fact	T Vergilio	2016-02-18	Pending
563	Chapter 7	#10: Th answer is correct. In the explanation, c1 should be an int and c2 should be a String rather than vice versa.	Typo	Peter Deak	2016-02-27	Pending
563	Chapter 7 mock explanation	#14: The correct answer is D as listed. The explanation part should say “and D is the only correct answer” instead of C.	Typo	Scott Selikoff	2015-12-22	Pending
564	Chapter 7	#17: Give yourself credit if you answered D becuase you noticed the missing import.	Typo		Typo	Scott Selikoff	2015-12-22	Pending
565	Chapter 8	#5 – append() does not throw an exception because it is a print writer. However, readLine() can throw an IOError (not an IOException). If you answered B and D, mark yourself as correct	Incorrect Answer	Juerg Bauman	2018-05-20	Pending
566	Chapter 8 answer	#10 – F is correct but we should remove it from the choices. Give yourself credit for this one whether you chose F or not.	Incorrect answer	Guillaume Bailly	2016-02-27	Pending
566	Chapter 8 mock answer	#12 – D is also a correct answer. While this works on both Windows and Mac, you don’t need to know that for the exam so give yourself credit whether you picked D or not.	Incorrect answer	Olivier Chalet	2016-05-27	Pending
567	Chapter 8	#21 – “a serialized empty array” should be “a serialized empty arraylist”	Typo	Donald Colvin	2017-07-29	Pending
569	Chapter 9	#6 – “Predictate” should be “Predicate”	Typo	Yuri Savchenko	2018-05-06	Pending
569	Chapter 9	#9 – “Stream<Path>” should be Stream<String>”	Typo	Alfonso Sanz	2016-09-04	Pending
570	Chapter 9	#12 – Choice G is correct given the typo in the question. Choice C is tricky. While it happens not to work, knowing that is beyond the scope of the exam. So give yourself credit either way.	Typo	Seb Cano	2016-02-02	Pending
570	Chapter 9	#16 – Choice E covers an edge case. Since we didn’t exclude a file with just commas, give yourself credit if you choose E and F.	Typo	Piotr Błądek	2016-09-17	Pending
571	Chapter 9	#17 – If you chose E and F as answers, give yourself credit. We meant which statement best describes the output.	Multiple possible answers	T Vergilio	2016-02-04	Pending
572	Chapter 10	#13: “open by the println” should be “open by rs.next()”/td>	Typo in explanation	Jorge Ruiz-Aquino	2017-12-13	Pending
572	Chapter 10	#18: The correct answer should be E. The answer should be E, not A because the result set type is not scollable.	Incorrect answer	Mike Constantin	2016-02-05	Pending
573	Chapter 10	various: The code should have braces around the try block. Wherever these were omitted, it as accidental	Typo	Peter Deak	2016-02-27	Pending
578	Appendix B	“to the take” should be “to take”	Typo	Guillaume Bailly	2016-02-27	Pending
604	Appendix C	In the last sentence of the paragraph below the table, the last sentence “number” should be “Date” both times it is mentioned.	Typo	T Vergilio	2016-03-05	Pending
604	Appendix C	In the last paragraph, “object for January 31, 1984” should be “object for July 4, 2015”	Typo	Marc-André Parent	2017-11-04	Pending
605	Appendix C	In the last code example, the output should be “04.07.2015 00:00” not “31.01.1984 17.47”	Typo	T Vergilio	2016-03-05	Pending
610	Appendix C	In the sentence before the “Using a Reentrant Lock” section, “Table 7.3” should be “Table 7.4”	Typo	T Vergilio	2016-03-05	Pending
610	Appendix C	In the first sentence in the “Using a Reentrant Lock” section, “is simple monitor lock” should be “is a simple monitor lock”	Typo	T Vergilio	2016-03-05	Pending
617	Appendix C	In the second paragraph, readLine() should be readLock()	Typo	Peter Fodor	2016-06-18	Pending
619	Appendix C	In the middle of the page, “all of the files contained with a directory tree” should be “all of the files contained within a directory tree”	Typo	T Vergilio	2016-03-05	Pending
621	Appendix C	The last sentence should say “override” rather than “overwrite” in both places	Typo	T Vergilio	2016-03-05	Pending
631	Appendix C	The println in the output should output path.toAbsolutePath() rather than path.getFileName() to match the output.	Typo	T Vergilio	2016-03-05	Pending
633	Appendix C	In the exam essentials “0b and 0b” should be “0b and 0B”	Typo	Marc-André Parent	2017-11-04	Pending
645	Appendix C	#6 – “Line 6” should be “Line 7”	Typo	Marc-André Parent	2017-11-04	Pending
646	Appendix C	#8 – in the explanation, the one about primitives being wrong should be option g	Typo	Vlad Alin	2023-06-03/td>	Pending
648	Appendix C	#21 – “H is incorrect” should be “G is incorrect”	Typo	Nick Robinson	2018-02-11	Pending

Online material type	Original error	Type of error	Reported by	Date confirmed	Reported to test vendor	Date fixed
Various	A number of questions say “choose all that apply” yet show radio buttons rather than checkboxes. It so happens these questions only have one correct answer. We wanted checkboxes to make them harder. We are working with the test vendor to get this fixed.	Online practice exam wrong question type	Jeanne Boyarsky	2015-12-19	2015-12-19	TBD
Mock exam 1	In the question that says StartOfJune, Month.JUNE should be 6.	Error	Jeanne Boyarsky	2015-12-19	2015-12-19	TBD
Mock exam 1	In the question about Integer and hashcode, change “given that a and b are of type Integer” to “given that a and b are classes that follow the spec”	Error	Radha Sahoo	2016-07-04	TBD	TBD
Mock exam 1	In the question about which is least likely to be supported by your JDBC driver, the answer should be E, not B.	Error	Tahir Abdullayev	2017-05-20	TBD	TBD
Mock exam 1	“map3.remove(key); // f2” should be “map3.remove(key); // f3”	Typo	Jerzy Los	2017-06-09	TBD	TBD
Mock exam 1	In the MonkeyCounter example, we should be importing concurrent.atomic	Typo	Vlad Alin	2023-06-16	TBD	TBD
Mock exam 2	In the question about FurryChipmunk, choice D should be “c instanceof Furry” and choice E should be “null instanceof FurryChipmunk” does not compile. This does not change the correct answer.	Error	Seb Cato	2016-03-15	TBD	TBD
Mock exam 2	In the question with the ExhibitionManager class, “public final static ExhibitionManager” should be “private final static ExhibitionManager”	Error	Olivier Chalet	2016-05-27	TBD	TBD
Mock exam 2	In the question with functional interface Chew, “public default isFed” should be “public default boolean isFed” and “abtract” should be “abstract”	Error	John Longer	2016-06-30	TBD	TBD
Mock exam 2	In the question with CONCUR_READ_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE), the answer is E, but not for the reason given. (It has to do with the test data which isn’t in the question. Change E to “The code does compile, but is incorrect”.	Error	John Longer	2016-06-30	TBD	TBD
Mock exam 2	In the question with System.console(), append() does not throw an exception because it is a print writer. If you answered A and D, mark yourself as correct	Incorrect Answer	Juerg Bauman	2018-05-20	Pending
Mock exam 2 explanation	In the question with assert x, the explanation should say “D and E are true” rather than “D is true and E is false”. The actual answer to the question is correct.	Typo	Jerzy Los	2017-06-09	TBD	TBD
Mock exam 2 explanation	In the question about OutputStream, the answer is correct but the explanation is not “So E is correct” should be “so F is incorrect”. Similarly, “So F is correct” should be “so G is incorrect”	Typo	Jerzy Los	2017-06-09	TBD	TBD
Mock exam 2	In the toy example, C is also a correct answer since toRealPath throws an IOException	Incorrect answer	Vlad Alin	2023-06-16	TBD	TBD
Mock exam 2	In the JDBC example, “String” should be “int” in “an Object cannot be assigned to a String”	Incorrect explanation	Hiroki Inoue	2023-08-26	TBD	TBD
Mock exam 3	In the question that has the answer “Trout has-a gills”, it should be “Trout has-a Gills”.	Typo	T Vergilio	2016-02-29	TBD	TBD
Mock exam 3	In the CustomException example, Choice D should be worded as “The code throws CustomException and also CustomException as a suppressed exceptions.” Choice E should be worded as “The code throws CustomException and two instances of CustomException as a suppressed exceptions.”	Rendering Error	T Vergilio	2016-02-29	TBD	TBD
Mock exam 3	In the lemur/habitat example, c is correct. B is incorrect. The wrong answer is in the exam	Error	T Vergilio	2016-02-29	TBD	TBD
Mock exam 3	In Option D of the Suit enum question, “Color.Black” should be “Color.BLACK”	Typo	Elena Abelev	2017-05-20	TBD	TBD
Mock exam 3	In option A of the Platypus question, “Platypus has-a Beak” should be “Platypus has-a UsesBeak”.	Typo	Elena Abelev	2017-05-20	TBD	TBD
Mock exam 3	In the question asking you to fill in the blanks, line 8 should be blank and the explanation should remove the last sentence	Typo	Jerzy Los	2017-06-09	TBD	TBD
Mock exam 3	In the PrintHolidays question, the explanation should say LongConsumer instead of Consumer<T>	Typo	Vlad Alin	2023-06-16	TBD	TBD
Mock exam 3	In the print properties example, “veggies” should be “omni” in the explanation.	Typo	Vlad Alin	2023-06-16	TBD	TBD
Flashcards set 1	Card #45: “other filenames” should be “other property files”	Error		2016-03-24	TBD	TBD
Flashcards set 1	Card #80 “META_INF/service” should be “META-INF/services”	Typo	Marc-André Parent	2017-11-04	Pending	Pending
Flashcards set 2	Card #2: both private and default access should be listed as allowed options	Error	Jeanne Boyarsky	2015-12-19	2015-12-19	2016-02-27
Flashcards set 2	Card #42: the answer should begin with a lowercase letter	Typo	Jeanne Boyarsky	2015-12-19	2015-12-19	2016-02-27
Flashcards set 2	Card #63: FileStream should be FileOutputStream (note some readers reported seeing FileInputStream rather than FileOuputStream; not sure where that error came from!)	Error	Seb Cano	2016-02-27	TBD	TBD
Flashcards set 2	Card #63: “used to read file data directly” should be “used to write file data directly”	Error	Jerzy Los	2017-04-22	TBD	TBD
Flashcards set 3	Card #22: The answer should include replaceAll	Error	T Vergilio	2016-03-22	TBD	TBD
Flashcards set 3	Card #23: The question should specify it is about ArrayList	Error	T Vergilio	2016-03-22	TBD	TBD
Flashcards set 3	Card #39: “two hours earlier” should be “ten hours later”	Error	Seb Cano	2016-02-27	TBD	TBD
Flashcards set 3	mills should be millis	Typo	Kilian Reisenegger	2016-05-03	TBD	TBD
Flashcards set 3	Card #64: BufferedInputStream should be BufferedOutputStream	Error	Seb Cano	2016-02-27	TBD	TBD
Chapter 6	#11 – Answer A should be Exception. This is correct in the book, but not the online material	Conversion error	T Vergilio	2016-01-31	TBD	TBD

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