Remember Collection Implementations

[Lennie De Villiers]

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

[Jason Irwin]

Yes. Knowing if Maps implement Collection etc is important.

Although according to K&B, Stack isn't in the exam (SCJP 6, anyway).

[Deepak Bala]

Yes it is important to know the interfaces and which class implements what.

[Andriy Pererva]

Yes, it is very impotent!
Just try to memorize this picture:



(C) K.Sierra & B.Bates - SCJP 6.0 Study Guide, p.558

[Lucas Smith]

This graph has an error. TreeMap can not extend NavigableMap.

[Jesper de Jong]

You're right, that should have been a dotted line (for "implements"). The same for TreeSet and NavigableSet.

[Lucas Smith]

Yeap - I saw this bug in K&B book.

[Andriy Pererva]

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.

[Lucas Smith]

I must agree
The book is awesome!

[Andriy Pererva]

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.

[Bert Bates]

fyi - the diagram shown here is from an older version of the book - I believe the diagram in the new version is correct.

[Palash Kumar]

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.

[Lucas Smith]

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?

[Palash Kumar]

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.

[Lucas Smith]

I have the K&B book for SCJP6 and the diagram is wrong.

[Bert Bates]

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

[Lucas Smith]

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.