/** * Check whether or not this fox is to give birth at this step. New births will be made into free * adjacent locations. * * @param newFoxes A list to return newly born foxes. */ private void giveBirth(List<Animal> newFoxes) { // New foxes are born into adjacent locations. // Get a list of adjacent free locations. Field field = getField(); List<Location> free = field.getFreeAdjacentLocations(getLocation()); int births = breed(); for (int b = 0; b < births && free.size() > 0; b++) { Location loc = free.remove(0); Fox young = new Fox(false, field, loc); newFoxes.add(young); } }
/** * Look for rabbits adjacent to the current location. Only the first live rabbit is eaten. * * @return Where food was found, or null if it wasn't. */ private Location findFood() { Field field = getField(); List<Location> adjacent = field.adjacentLocations(getLocation()); Iterator<Location> it = adjacent.iterator(); while (it.hasNext()) { Location where = it.next(); Object animal = field.getObjectAt(where); if (animal instanceof Rabbit) { Rabbit rabbit = (Rabbit) animal; if (rabbit.isAlive()) { rabbit.setDead(); foodLevel = RABBIT_FOOD_VALUE; return where; } } } return null; }