[JAVA][Beginning Java 8 Games Development]

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Chapter 12 ■ Setting Boundaries for Your Action Figure in 2D: Using the Node Class LocalToParent Attribute Figure 12-9. Add a Java this keyword inside of the GamePlayLoop() constructor method call to provide a context object As long as we are making our InvinciBagel.java class completely encapsulated, let’s make the StackPane root variable private as well, and get rid of the static modifier. Since I have moved the StackPane object named root back up into the .start() menu from the .createSplashScreenNodes() method, there is no good reason for a static modifier keyword. I am trying to remove all static modifiers (that are not constants) and “privatize” this class as much as I can. Removing the Rest of the Static Variables: StackPane and HBox Now I am going to start going right down the variable declaration lines of code at the top of the InvinciBagel.java class starting with the Boolean variables that we made private (which were public static), and see which of these variables I can make private instead of package protected static (which StackPane and HBox are currently), or which are package protected, and can be made private. A private variable “encapsulates” that variable’s data inside of the class (object) itself; in this case, this would be the InvinciBagel.java code that we’re currently refining. A package protected variable encapsulates the data inside of the package; in this case that would be the invincibagel package. The new Java statement for declaring the StackPane object named root, which is a root element of the Scene Graph, to be a private member of the InvinciBagel.java class (only), would be accomplished using the following code, shown in Figure 12-10. private StackPane root; www.it-ebooks.info 261
Chapter 12 ■ Setting Boundaries for Your Action Figure in 2D: Using the Node Class LocalToParent Attribute Figure 12-10. Change the declaration statement for the StackPane object named root from a static modifier to private The next static variable down in the declarations at the top of the class is static HBox buttonContainer; and I am also going to change this variable declaration to be a private variable, using the following Java statement: private HBox buttonContainer; Let’s make sure that the Java statements inside of the .createSplashScreenNodes() method can still “see” or reference this buttonContainer HBox object, which as you can see in Figure 12-11, they can. I also clicked on the HBox object in NetBeans so that it showed me the object references throughout my code (this is a really useful feature that you should use to visualize how objects relate between different Java 8 programming statements inside of your code). This selected object highlighting is shown in your code inside of NetBeans 8 by using a yellow field highlighting color. 262 www.it-ebooks.info
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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 4 ■ An Introduction to Ja
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Chapter 5 An Introduction to Game D
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Chapter 5 ■ An Introduction to Ga
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Chapter 6 The Foundation of Game De
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Chapter 6 ■ The Foundation of Gam
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Chapter 7 The Foundation of Game Pl
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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 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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