- Course
From Collections to Streams in Java 8 Using Lambda Expressions
This course shows the new patterns introduced in Java 8, based on lambda expressions, the functional interfaces, the Collection Framework and the Stream API.
Intermediate
- Course
From Collections to Streams in Java 8 Using Lambda Expressions
This course shows the new patterns introduced in Java 8, based on lambda expressions, the functional interfaces, the Collection Framework and the Stream API.
Intermediate
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What you'll learn
Java 8 brought many new patterns to build efficient and clean applications. In this course, we cover one most important new thing: lambda expressions. Lambdas are a nice thing, but would be useless without new patterns to process data. These new patterns have been added to the Collection Framework, and to a the new Stream API. This course quickly explains what the map / filter / reduce pattern is about, and why is has been added to the Stream API. This new API is precisely described: how it can be used to efficiently process data and how it can be used in parallel. Caveats and corner cases are also shown.
From Collections to Streams in Java 8 Using Lambda Expressions
Intermediate
Table of contents
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Introduction to the Course | 3m 7s
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What Are You Going to Learn in This Course? | 2m 9s
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Agenda of the Course | 1m 31s
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Who Are You? What Should You Know to Follow This Course? | 1m 40s
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Agenda of This Module | 1m 5s
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Lambda Expression: Introduction, Instances of Anonymous Classes | 3m 24s
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Lambda Expression: Passing Code as a Parameter | 2m 9s
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Let Us Write Our First, Simple Lambda Expressions | 3m 2s
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Lambda Expression: Remarks and Precisions | 1m 51s
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Method References: A First Example with an Instance Method | 2m 29s
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Method References: A Second Example with a Static Method | 2m 9s
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Method References: The System.out.println Pattern | 1m 32s
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How to Create New API: Default and Static Methods in Interfaces | 2m 6s
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Live Coding Introduction: The Comparator Example | 53s
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Implementing a Comparator with Lambda Expressions | 2m 17s
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Comparing by Age, Last Name, and First Name | 57s
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Refactoring the Comparison with a Key Extractor | 2m
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Implementing the Comparator.comparing Static Method | 2m 48s
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Making the Key Extractor Generic, Returning Comparable Objects | 2m 3s
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Chaining Comparators with the thenComparing Default Method | 2m 7s
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Writing the Comparator.thenComparing Implementation | 1m 36s
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Writing the Final Comparator Creation and Chaining Pattern | 2m 47s
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Wrap-up of the Module | 1m 56s
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Version Check | 15s
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Introduction to the Module | 1m 34s
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What Is a Functional Interface? The Predicate Example | 2m 1s
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How to Implement a Functional Interface with a Lambda Expression | 2m 7s
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How Does the Compiler Recognize the Type of a Lambda Expression? | 3m 52s
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A Lambda Is Still an Interface with Usable Methods | 35s
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Functional Interface: The Complete and Exact Definition | 3m 24s
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How to Use the @FunctionalInterface Annotation | 2m 50s
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The Four Categories of the java.util.function Package | 1m 8s
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First Category: The Consumers | 59s
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Second Category: The Supplier | 1m 24s
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Third Category: The Functions | 2m 31s
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Fourth Category: The Predicates | 1m 8s
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Functional Interfaces for Java Primitive Types | 1m 29s
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Introduction to the Live Coding Section: The Predicate Example | 1m 34s
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Writing and Using a First, Simple Predicate Lambda Expression | 1m 49s
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Chaining Predicates with the AND Boolean Operation | 1m 44s
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Adding a and() Method on the Predicate Functional Interface | 1m 35s
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Implementing the and() Default method on the Predicate Interface | 3m 44s
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Adding a or() Default Method on the Predicate Interface | 3m 12s
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Creating Predicates with a Static Call on a Functional Interface | 2m 41s
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Making the isEqualsTo() Method Generic of the Predicate Interface | 1m 32s
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Live Coding Wrap-up | 1m 14s
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Module Wrap-up, Presentation of the Next Module | 1m 53s
Passionate about programming computers for over 20 years, Jose made his debut in assembler and C, C for SIMD parallel machines before adopting Java as an object-oriented language. Assistant professor in Paris North University for more than 15 years, Jose also brings his expertise to many projects, in various industrial fields.