private void paintAnimations(Graphics2D g2d) {
LinkedList<Animation> toRemove = new LinkedList<Animation>();
// get all the animations you can, forget about the ones that are about to be added
animationLock.lock();
List<Animation> toPaint = (List<Animation>) animations.clone();
animationLock.unlock();
for (Animation x : toPaint) {
if (x.isOver()) toRemove.add(x);
else x.step(g2d);
}
animations.removeAll(toRemove);
}
