© Peter Späth and Jeff Friesen 2020
P. Späth, J. FriesenLearn Java for Android Developmenthttps://doi.org/10.1007/978-1-4842-5943-6_9

9. Exploring the Collections Framework

Peter Späth1  and Jeff Friesen2
(1)
Leipzig, Sachsen, Germany
(2)
Winnipeg, MB, Canada
 

Applications often must manage collections of objects. Although you can use arrays for this purpose, they are not always a good choice. For example, arrays have fixed sizes, making it tricky to determine an optimal size when you need to store a variable number of objects. Also, arrays can be indexed by integers only, making them unsuitable for mapping arbitrary objects to other objects.

The standard class library provides the Collections Framework and legacy utility APIs to manage collections on ...

Get Learn Java for Android Development: Migrating Java SE Programming Skills to Mobile Development now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.