November 2024
Intermediate to advanced
499 pages
12h 13m
English
Content preview from Core Java for the Impatient, 4th Edition
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Chapter 7 ▪ Collections
Many data structures have been developed so programmers can store and retrieve values efficiently. The Java API provides implementations of common data structures and algorithms, as well as a framework to organize them. In this chapter, you will learn how to work with lists, sets, maps, and other collections.
The key points of this chapter are:
-
The
Collectioninterface provides common methods for all collections, except for maps which are described by theMapinterface. -
A list is a sequential collection in which each element has an integer index.
-
A set is optimized for efficient containment testing. Java provides
HashSetandTreeSetimplementations. -
For maps, you have the choice between
HashMapandTreeMap
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