August 2003
Intermediate to advanced
672 pages
16h 23m
English
book
Programmer's Guide to Java™ Certification, A: A Comprehensive Primer, Second Edition
by Khalid A. Mughal, Rolf W. Rasmussen
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Section 9: The Collections Framework (Chapter 11)
Make appropriate selection of collection classes/interfaces to suit specified behavior requirements.
Distinguish between correct and incorrect implementations of hashcode methods.
Study Notes
The collections framework consists of various interfaces, concrete implementations of collections, and utility classes. Familiarity with the methods defined by the interfaces is required. Some collection interfaces are better suited for certain types of information. Knowledge of which collection implementation is best suited for a particular situation is important.
The hashCode() method of two objects must return the same result if the state of the objects are equal according to the equals() method, and must ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.