[JAVA][Beginning Java 8 Games Development]

Chapter 9 ■ Controlling Your Action Figure: Implementing Java Event Handlers and Using Lambda Expressions
Game Surface Design: Adding Resolution Flexibility
The first thing that I want to do to the InvinciBagel.java code, which should already be open in a tab in NetBeans (if it
is not, use the right-click and Open work process), is to add WIDTH and HEIGHT constants for the game application.
The reason for doing this is that you may want to provide custom versions for netbooks or tablets (1024 by 600), or
iTV set or eReaders (1280 by 720) or HDTV usage (1920 by 1080) or even for new 4K iTV sets (4096 by 2160). Having
a height and width variable allows you to not have to change your Scene() constructor method call later, and to do
certain screen boundary calculations using these variables rather than “hard coded” numeric values throughout your
code. As you can see at the top of Figure 9-1, I have created a constant declaration for these two variables using a
single line of Java code, which is known as a compound statement, as you learned in the previous chapter. The Java
code for this declaration can be seen at the top of the class in Figure 9-1, and should look like the following:
static final double WIDTH = 640, HEIGHT = 400;
Figure 9-1. Add private static final double WIDTH and HEIGHT constants; install these, and Color.WHITE, in Scene()
The next thing that we will want to do is the upgrade our Stage() constructor method call, to use one of the other
overloaded constructor methods that allows us to also specify the background color value. Let’s use the Color class
constant of WHITE, and our new width and height display screen size constants, and create this new constructor
method call, using the following line of Java code, which is also shown (laden with errors) at the bottom of Figure 9-1:
scene = new Scene(root, WIDTH, HEIGHT, Color.WHITE);
As you can see in Figure 9-1, you will have a wavy red error underline under your Color class reference, until you
use the Alt-Enter work process to bring up the helper dialog (as shown), and select the option that specifies “Add
import for javafx.scene.paint.Color” in order to have NetBeans write the Java import statement for you. Once you do
this, your code will be error free, and we will be ready to write some code that will put this background color in place.
To do this, we’ll need to hide the ImageView Node objects that hold our full screen (splashScreenbackplate)
and overlay (splashScreenTextArea) image assets. We will do this by setting the visible attribute (or characteristic, or
parameter, if you prefer) to a value of false, which will allow the white background color that we set to show through.
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