[JAVA][Beginning Java 8 Games Development]

Chapter 12 ■ Setting Boundaries for Your Action Figure in 2D: Using the Node Class LocalToParent Attribute
As you can see in Figure 12-8, I have clicked on the invinciBagel variable (InvinciBagel object reference) so it is
highlighted, and you can see its usage across the two methods. The declaration is used in the GamePlayLoop class,
the instance inside of the GamePlayLoop() constructor method is set using the InvinciBagel class this keyword (using
the iBagel parameter), and the variable reference inside of the .handle() method accessed the Bagel class .update()
method using the iBagel Bagel object and the invinciBagel InvinciBagel reference object. Java is advanced, but cool.
Now that we have created our custom GamePlayLoop() constructor method that accommodates the receipt of
the InvinciBagel object reference named iBagel, and then assigns it to the invinciBagel variable, it is time to return to
the InvinciBagel.java code (editing tab in NetBeans).
The final piece of this (second) puzzle of removing the static Bagel iBagel; declaration is to add the Java
this keyword in the GamePlayLoop() constructor method call. After we do this, our InvinciBagel, Bagel and
GamePlayLoop will all be wired up to each other, without using any static variables (other than the WIDTH and
HEIGHT constants).
Using this in GamePlayLoop() Constructor: GamePlayLoop(this)
Open up your .createStartGameLoop() method structure, using the + expand icon on the left side of NetBeans, as
shown in Figure 12-9. Add the Java this keyword in the parameter area, so that you are again passing the InvinciBagel
object reference, this time into the GamePlayLoop() constructor method call. This will give that class a reference to
your InvinciBagel class and its context and structure, just like you did with the Bagel class. Your newly revised Java
method body and constructor method call will look like the following code, which is shown highlighted in Figure 12-9:
private void createStartGameLoop() {
gamePlayLoop = new GamePlayLoop(this);
gamePlayLoop.start();
}
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