Core Java, Vol. II-Advanced Features, 12th Edition

Chapter 1. Streams

In this chapter

• 1.1 From Iterating to Stream Operations

• 1.2 Stream Creation

• 1.3 The filter, map, and flatMap Methods

• 1.4 Extracting Substreams and Combining Streams

• 1.5 Other Stream Transformations

• 1.6 Simple Reductions

• 1.7 The Optional Type

• 1.8 Collecting Results

• 1.9 Collecting into Maps

• 1.10 Grouping and Partitioning

• 1.11 Downstream Collectors

• 1.12 Reduction Operations

• 1.13 Primitive Type Streams

• 1.14 Parallel Streams

Compared to collections, streams provide a view of data that lets you specify computations at a higher conceptual level. With a stream, you specify what you want to have done, not how to do it. You leave the scheduling of operations to the implementation. For example, suppose you want to compute the average ...