When we say “Java collections”, we actually can mean two things. In a general sense, we talk about implementations of common data structures, like array-based lists, sets, queues, maps, vectors etc. In a more narrow understanding, we describe concrete abstractions and implementations, which together make Java Collections Framework. This is a set of most widely used data structures and corresponding algorithms (like sorting, searching or filtering), which inherit the root java.util.Collection interface. The book covers both standard Java tools (Java 11+) and Apache Commons Collections utils.

This guide covers following topics

1. Common collections methods

2. Streams

3. Lists

4. Sets

5. Queues

6. Maps

7. AssertJ tools for collections

8. Iterators

For software developers of all levels