[JAVA][Beginning Java 8 Games Development]

Chapter 7 ■ The Foundation of Game Play Loop: The JavaFX Pulse System and the Game Processing Architecture
Once NetBeans adds the import javafx.animation.AnimationTimer; programming statement, you will be
ready to start creating this class, which will harness the JavaFX pulse engine for you and contain all your core game
play loop processing, or calls to classes and methods that will perform the various types of processing, such as sprite
movement, sprite animation, collision detection, physics simulation, game logic, audio processing, AI, scoreboard
updates, and the like.
Creating the GamePlayLoop Class Structure: Implementing
Your .handle( ) Method
Note that once the import statement has been written for you by NetBeans, yet another wavy red error highlight
appears below the GamePlayLoop class name. Mouse over this to find out what the error message is relating to this
newest error. As Figure 7-6 demonstrates, the .handle() method required for every AnimationTimer subclass has not
yet been implemented (also called overridden) in this GamePlayLoop.java class, so you have to do this next. Maybe
you can even get NetBeans to write the code for you; let’s take a look, and see!
Figure 7-6. Once you extend and import AnimationTimer, NetBeans throws an error: class does not implement
the .handle()
As you can see at the bottom left of the error message pop-up, you can use the Alt+Enter keystroke combination
to bring up a helper dialog, which will offer you several solutions, including one that will actually write the
unimplemented .handle() method for you. Select Implement all abstract methods, shown in Figure 7-7, highlighted
in blue. Once you double-click this option, NetBeans will write this method structure for you:
@Override
public void handle (long now) {
throw new UnsupportedOperationException("Not supported yet.");
}
150
www.it-ebooks.info