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You're reading from Spring 5.0 Cookbook Recipes to build, test, and run Spring applications efficiently

Product type Paperback

Published in Sep 2017

Publisher Packt

ISBN-13 9781787128316

Length 670 pages

Edition 1st Edition

Languages

Java

Tools

Spring

Concepts

Application Development

Author (1):

Sherwin John C. Tragura

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Table of Contents (14) Chapters

Preface

1. Getting Started with Spring FREE CHAPTER

2. Learning Dependency Injection (DI)

3. Implementing MVC Design Patterns

4. Securing Spring MVC Applications

5. Cross-Cutting the MVC

6. Functional Programming

7. Reactive Programming

8. Reactive Web Applications

9. Spring Boot 2.0

10. The Microservices

11. Batch and Message-Driven Processes

12. Other Spring 5 Features

13. Testing Spring 5 Components

Applying streams to collections

Java stream is currently used to transform, manipulate, consume, reduce, and/or transfer data without changing its data structure. Since a Stream object is not a data structure, it is designed to be generated by some of the most popular data structures in Java, namely arrays and collections, to perform a faster declarative way of data processing. It also has some utility methods that can generate data structures from the baseline.

Getting started

Open project ch06 again and add some services that will manipulate EmployeeDao data using stream methods.

How to do it...

The previous recipe provided with the process for how to generate the Stream objects from a source data structure. It is time to scrutinize and study the operations involved in stream objects:

Open again the class EmployeeStreamService in the package org.packt.functional.codes.service.impl and add this set of methods that initializes Employee, arrays and converts List<Employee> to Employee[] using...