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Remember Collection Implementations
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Lennie De Villiers
Greenhorn
Joined: Jul 17, 2009
Posts: 24
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Hi,
Is it important to remember which class implements which interface etc for the exam?
Like Vector implements List, Stack extends Vector, ArrayList implements List interface etc.
cheers
Lennie De Villiers
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Jason Irwin
Ranch Hand
Joined: Jun 09, 2009
Posts: 327
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Yes. Knowing if Maps implement Collection etc is important.
Although according to K&B, Stack isn't in the exam (SCJP 6, anyway).
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SCJP6
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Deepak Bala
Bartender
Joined: Feb 24, 2006
Posts: 6588
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Yes it is important to know the interfaces and which class implements what.
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SCJP 6 articles - SCJP 5/6 mock exams - SCJP Mocks - SCJP 5 Mock exam (Word document ) - SCJP 5 Mock exam in Java.Inquisition format
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Andriy Pererva
Ranch Hand
Joined: Jul 19, 2009
Posts: 73
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Yes, it is very impotent!
Just try to memorize this picture:
(C) K.Sierra & B.Bates - SCJP 6.0 Study Guide, p.558
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SCJP 6.0(95%), SCWCD 5(94%), SCJD (working on B&S v.2.3.1)
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Lucas Smith
Ranch Hand
Joined: Apr 20, 2009
Posts: 804
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This graph has an error. TreeMap can not extend NavigableMap.
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SCJP6, SCWCD5, OCE:EJBD6.
BLOG: http://leakfromjavaheap.blogspot.com
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Jesper de Jong
Java Cowboy
Bartender
Joined: Aug 16, 2005
Posts: 12921
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You're right, that should have been a dotted line (for "implements"). The same for TreeSet and NavigableSet.
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Java Beginners FAQ - JavaRanch SCJP FAQ - The Java Tutorial - Java SE 7 API documentation
Scala Notes - My blog about Scala
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Lucas Smith
Ranch Hand
Joined: Apr 20, 2009
Posts: 804
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Yeap - I saw this bug in K&B book.
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Andriy Pererva
Ranch Hand
Joined: Jul 19, 2009
Posts: 73
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In fact, this book has a lot of little mistakes but despite all of them, the book is really the best SCJP preparation guide I ever seen and read.
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Lucas Smith
Ranch Hand
Joined: Apr 20, 2009
Posts: 804
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I must agree 
The book is awesome!
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Andriy Pererva
Ranch Hand
Joined: Jul 19, 2009
Posts: 73
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Especially the concept of "two-minute drills" at the end of every chapter! It often helps to refresh the obtained knowledge after whole book reading completed.
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Bert Bates
author
Sheriff
Joined: Oct 14, 2002
Posts: 8712
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fyi - the diagram shown here is from an older version of the book - I believe the diagram in the new version is correct.
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Eliminate fossil fuel subsidies. (If you're not on the edge, you're taking up too much room.)
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Palash Kumar
Ranch Hand
Joined: Jul 21, 2009
Posts: 33
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Bert Bates wrote:fyi - the diagram shown here is from an older version of the book - I believe the diagram in the new version is correct.
yes, its correct in new books. this book is really very good.
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SCJP 6 with 80%, going for SCWCD
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Lucas Smith
Ranch Hand
Joined: Apr 20, 2009
Posts: 804
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Bert Bates wrote:fyi - the diagram shown here is from an older version of the book - I believe the diagram in the new version is correct.
The new version? NavigableXxxs appeared in J6 so is there the second revision of K&B book for SCJP6?
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Palash Kumar
Ranch Hand
Joined: Jul 21, 2009
Posts: 33
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Lukas Smith wrote:The new version? NavigableXxxs appeared in J6 so is there the second revision of K&B book for SCJP6?
i do not know, which version book i have, but the diagram shown above is correct in my book.
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Lucas Smith
Ranch Hand
Joined: Apr 20, 2009
Posts: 804
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I have the K&B book for SCJP6 and the diagram is wrong.
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Bert Bates
author
Sheriff
Joined: Oct 14, 2002
Posts: 8712
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Hi Lukas,
Are you looking at a Polish or other non-U.S. version of the book? Sometimes what we call "foreign" editions are actually older editions.
Thanks,
Bert
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Lucas Smith
Ranch Hand
Joined: Apr 20, 2009
Posts: 804
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I think that there is no Polish edition, but on the other hand the english one is very good.
Actually I read ebook version from CD-ROM which was included. And the diagram in that version is wrong.
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subject: Remember Collection Implementations
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