[JAVA][Beginning Java 8 Games Development]

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Chapter 4 ■ An Introduction to JavaFX 8: Exploring the Capabilities of the Java 8 Multimedia Engine A Worker object performs processing, using a background thread, and can be either reusable (such as in the Service class) or not reusable (such as in the Task class). Worker thread states are controlled by the Worker.State class (object) and contain the life cycle stages for a Worker thread. These apply across the three primary classes in the javafx.concurrent package, as they implement the Worker interface and its related nested classes. As mentioned in the previous chapter, a nested class is accessed via dot notation, so the State class is thus nested inside the Worker interface (class). Because the states of a Worker thread are very important to understand before you use it, I am going to detail them in the form of a table so that they are crystal clear to you (see Table 4-3). Table 4-3. Worker Thread Life Cycle States, as Defined by the Worker.State Nested Class for Use with a Worker Interface Worker.State Constant READY SCHEDULED RUNNING SUCCEEDED FAILED CANCELLED Significance Worker object (thread) has been initialized (or reinitialized) and is ready to be used. Worker object (thread) has been scheduled for execution but is not currently running. Worker object (thread) is currently running and is executing the Java programming logic. Worker object (thread) has executed successfully, and a valid result is in the value property. Worker object (thread) has failed to execute successfully because of some unexpected condition. Worker object (thread) has been cancelled by invoking the Worker.cancel() method call. As with everything else in this JavaFX 8 multimedia engine overview chapter, you will be getting deep into the details of how to use these packages, classes, nested classes, interfaces, methods, constants, and variables over the course of the book, as you apply these JavaFX programming constructs and concepts! Summary In this fourth chapter, you took a closer look at some of the more important packages, concepts, components, classes, constructors, constants, and variables (attributes) that can be found in the JavaFX 8 API, an impressive collection of 36 javafx.packagename.subpackagename packages, which I outlined in tables and covered, one by one, as needed for multimedia 2D and 3D (and hybrid 2D-3D) game development. When I say, “an overview,” I mean an overview! Certainly, I cannot discuss every functional class in JavaFX in one chapter, so I started with a broad overview of the JavaFX engine and how it integrates with the JavaFX Scene Builder tool and the JavaFX Scene Graph API above it, and with the Java 8 API, NetBeans 8.0, and target OSs below it, which give JavaFX expansive OS support across so many popular platforms and devices and the leading web browsers. I presented a high-level technical view of JavaFX, detailing its structures, including JavaFX Scene Graph, APIs, Quantum, Prism, Glass, WebKit, and Media engine. You looked at how these multithreading, rendering, windowing, media, and web engines interface with the Java 8 API and Java JDK 8 as well as with NetBeans 8.0 and the JVM bytecode that it generates, which is read by all the various OS platforms currently running across a dozen different consumer electronics device types. You also explored JavaFX core concepts, such as the JavaFX Scene Graph and the JavaFX pulse events system, which you will be leveraging to create a Java 8 game as you work through this book, starting in the next chapter, when I explain how to use the JavaFX Scene Builder visual editing tool in NetBeans. Then, you dove deep into some of the key JavaFX packages and subpackages for game design, such as Application, Scene, Shape, Effect, Layout, Control, Media, Image, Stage, Animation, Geometry, Event, and Concurrent, and their package classes and subclasses and even, in some cases, their interfaces, nested classes, and constants. 98 www.it-ebooks.info
Chapter 4 ■ An Introduction to JavaFX 8: Exploring the Capabilities of the Java 8 Multimedia Engine You even took a break to add some code to your InvinciBagel application that turned it into a windowless application and learned how to make the stage, scene, and stackPane background plates transparent, using alpha channels and hexadecimal #00000000 or Color.TRANSPARENT, Background.EMPTY, and SceneStyle.TRANSPARENT constants. I had to get some work with the NetBeans IDE 8.0, Java 8 programming language, and JavaFX API into this chapter somehow! In the next chapter, you are going to explore the JavaFX Scene Builder, which makes it easy to construct the Scene Graph structures that you learned about in this chapter. You will start to build your game splash screen as well, as I know you are eager to get started on a game infrastructure, even if it is just a splash screen! www.it-ebooks.info 99
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Contents at a Glance About the Auth
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Introduction The Java Programming L
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■ Introduction In Chapter 13 you
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Chapter 1 ■ Setting Up a Java 8 G
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Chapter 2 Setting Up Your Java 8 ID
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Chapter 2 ■ Setting Up Your Java
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Profiling Your Java 8 Game Applicat
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Chapter 3 ■ A Java 8 Primer: An I
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Chapter 3 ■ A Java 8 Primer: An I
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Chapter 8 Creating Your Actor Engin
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Chapter 8 ■ Creating Your Actor E
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Chapter 9 Controlling Your Action F
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Chapter 9 ■ Controlling Your Acti
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Chapter 10 Directing the Cast of Ac
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Chapter 12 Setting Boundaries for Y
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Chapter 13 ■ Animating Your Actio
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Chapter 14 ■ Setting Up the Game
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Chapter 15 Implementing Game Audio
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Chapter 15 ■ Implementing Game Au
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Chapter 16 ■ Collision Detection:
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Chapter 17 Enhancing Game Play: Cre
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Chapter 17 ■ Enhancing Game Play:
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■ index Background image (cont.)
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■ index InvinciBagel animation (c
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■ index Modifier keywords access
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Beginning Java 8 Games Development
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This Java 8 Game Development book i
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■ Contents NetBeans 8.0 Is User I
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■ Contents ■■Chapter 5: An In
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■ Contents Creating a Hero Superc
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■ Contents Organizing the .update
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■ Contents Optimizing the Scene G
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About the Author Wallace Jackson ha
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Acknowledgments I would like to ack
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