Java SE 8 for the Really Impatient

Contents

Preface

About the Author

1 LAMBDA EXPRESSIONS

1.1 Why Lambdas?

1.2 The Syntax of Lambda Expressions

1.3 Functional Interfaces

1.4 Method References

1.5 Constructor References

1.6 Variable Scope

1.7 Default Methods

1.8 Static Methods in Interfaces

Exercises

2 THE STREAM API

2.1 From Iteration to Stream Operations

2.2 Stream Creation

2.3 The filter, map, and flatMap Methods

2.4 Extracting Substreams and Combining Streams

2.5 Stateful Transformations

2.6 Simple Reductions

2.7 The Optional Type

2.7.1 Working with Optional Values

2.7.2 Creating Optional Values

2.7.3 Composing Optional Value Functions with flatMap

2.8 Reduction Operations

2.9 Collecting Results

2.10 Collecting into Maps

2.11 Grouping and Partitioning

2.12 Primitive Type Streams ...