Summary
This wasn't an easy chapter. It doesn't matter if you don't understand how all the various classes and interfaces interconnect yet. Feel free to go back and reread the Introducing the Entity-Component pattern and Introducing the Simple Factory pattern sections, as well as study the code we've covered so far, if you need to. However, continuing with the project as we code more of the components and finish the game will also help just as much.
Don't spend too long scratching your head if the components and factories aren't completely clear to you – keep making progress; using the concepts will bring clarity much more quickly than thinking about them.
When I was planning this book, I thought about stopping after the Snake game. In fact, the first edition of Learning Java by Building Android Games did stop after the Snake game. For the second edition onward, I decided that wouldn't be fair because you would have been armed with...
