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Learning RxJava

You're reading from   Learning RxJava Reactive, Concurrent, and responsive applications

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Product type Paperback
Published in Jun 2017
Publisher Packt
ISBN-13 9781787120426
Length 400 pages
Edition 1st Edition
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Author (1):
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Thomas Nield Thomas Nield
Author Profile Icon Thomas Nield
Thomas Nield
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Table of Contents (14) Chapters Close

Preface 1. Thinking Reactively FREE CHAPTER 2. Observables and Subscribers 3. Basic Operators 4. Combining Observables 5. Multicasting, Replaying, and Caching 6. Concurrency and Parallelization 7. Switching, Throttling, Windowing, and Buffering 8. Flowables and Backpressure 9. Transformers and Custom Operators 10. Testing and Debugging 11. RxJava on Android 12. Using RxJava for Kotlin New Appendix

Grouping keystrokes

We will wrap up this chapter by integrating most of what we learned and achieve a complex task: grouping keystrokes that happen in rapid succession to form strings without any delay! It can be helpful in user interfaces to immediately "jump" to items in a list based on what is being typed or perform auto-completion in some way. This can be a challenging task, but as we will see, it is not that difficult with RxJava.

This exercise will use JavaFX again with RxJavaFX. Our user interface will simply have a Label that receives rolling concatenations of keys we are typing. But after 300 milliseconds, it will reset and receive an empty  "" to clear it. Here is the code that achieves this as well as some screenshots with the console output when I type "Hello" and then type "World" a moment later:

import io.reactivex.Observable...
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