We define our variables required by adding our desired variables, such as rockStartTime, rocks, and rnd:
public static final int WIDTH = 1920;public static final int HEIGHT = 1080;public static final int MOVINGSPEED = -5;private long rockStartTime;private MainGameThread mainThread;private BackgroundImage bgImg;private PlayerCharacter playerCharacter;private ArrayList<Rock> rocks;private Random rnd = new Random();
These variables give us references of objects to work with.
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