[JAVA][Beginning Java 8 Games Development]

Chapter 17 ■ Enhancing Game Play: Creating a Scoring Engine, Adding Treasure and an Enemy Auto-Attack Engine
The Random class has two constructors, a Random() constructor, which we will be using, and an overloaded
Random(long seed) constructor, where you can specify the seed value for the Random Number Generator that this
class implements. Once you have a Random object, you can call one of almost two dozen (22) methods that generate
different types of random values. The method calls we’ll be using during this chapter are the .nextInt(int bound) and
.nextBoolean() method calls. In case you are wondering, there is also a .nextInt() method, but we need to generate a
random number inside of a specific range (zero to bottom of screen), and the .nextInt(int bound) allows generation
of a random number range from zero to the specified integer bound (boundary) passed over inside of the method call.
We will be using the Random class for our Enemy attack strategy (and code) in the Enemy.java class. Let’s go
ahead and declare and instantiate a Random object named randomNum at the top of the Enemy.java class, as shown
in Figure 17-28, using the following compound (declaration plus instantiation) Java 8 programming statement:
protected static final Random randomNum = new Random();
Figure 17-28. Declare and instantiate a Random Number Generator at the top of the Enemy.java class using Random()
We will be using this Random (number generator) object throughout the remainder of this chapter to add
random attack positions, sides, and bullets for our Enemy iBeagle object, so that he can try his best to take down the
InvinciBagel character (the game player), or at least cause him to generate lots of negative scoring points if he can!
Mounting the Attack: Coding the Enemy Onslaught
First we need to declare counter variables, seen highlighted in Figure 17-29, using the following two Java statements:
int attackCounter = 0;
int attackFrequency = 250;
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