public void update(int elapsedTimeMilisec) { for (Projectile p : projectileList) { p.update(elapsedTimeMilisec); } // Remove inactive invaders for (int i = this.projectileList.size() - 1; i >= 0; i--) { if (this.projectileList.get(i).isRemoved()) { this.projectileList.remove(i); } } for (Wall w : this.walls) { w.clearPieces(); } for (Animation explosion : Game.explosionList) { explosion.update(elapsedTimeMilisec); } for (int i = this.walls.size() - 1; i >= 0; i--) { if (walls.get(i).isRemoved()) { walls.remove(i); } } }