[JAVA][Beginning Java 8 Games Development]

Chapter 10 ■ Directing the Cast of Actors: Creating a Casting Director Engine and Creating the Bagel Actor Class
A .resetCollideCheckList() method uses a .clear() method to clear out the COLLIDE_CHECKLIST and then uses
an .addAll() method to add (insert) the contents of the CURRENT_CAST object into the COLLIDE_CHECKLIST object.
public void resetCollideCheckList() {
COLLIDE_CHECKLIST.clear();
COLLIDE_CHECKLIST.addAll(CURRENT_CAST);
}
Now that we have our ArrayList objects set up to hold cast members and advanced collision list data sets,
let’s create a HashSet object. This Set object will be used to collect Actors that for one reason or another need
to be removed from the game play (the Scene and the Stage).
Creating a HashSet Object: REMOVED_ACTORS Data Store Set
Now let’s create our third Set HashSet data store object, and let’s call it REMOVED_ACTORS, since it will
be used to hold a collection of Actor objects that have been removed from the current Stage. This Set object
will hold all of the Actor objects that for whatever reason need to be removed from the CURRENT_CAST List. The
REMOVED_ACTORS data store (data set) will have three associated methods.
The .getRemovedActors() method will return the REMOVED_ACTORS object, the .addToRemovedActors() will
be the “core” method that will add Actor objects to the REMOVED_ACTORS Set object as things happen
during game play (finding treasure, killing enemies, etc.) that eliminate an Actor object from the Stage and Scene,
and the .resetRemovedActors() that will use the .removeAll() method to remove Actors from the CURRENT_CAST
ArrayList object, and then reset the REMOVED_ACTORS data set, by using the .clear() method call on the
REMOVED_ACTORS HashSet object. The code, seen in Figure 10-8, needed to declare and instantiate the HashSet
object using the Java new keyword, looks like this:
private final Set REMOVED_ACTORS = new HashSet();
Figure 10-8. Add a private final Set named REMOVED_ACTORS and use the Java new keyword to create a HashSet
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