/**
* Run the simulation from its current state for a single step. Iterate over the whole field
* updating the state of each fox and rabbit.
*/
public void simulateOneStep() {
step++;
// Provide space for newborn rabbits.
List<Rabbit> newRabbits = new ArrayList<Rabbit>();
// Let all rabbits act.
for (Iterator<Rabbit> it = rabbits.iterator(); it.hasNext(); ) {
Rabbit rabbit = it.next();
rabbit.run(newRabbits);
if (!rabbit.isAlive()) {
it.remove();
}
}
// Provide space for newborn foxes.
List<Fox> newFoxes = new ArrayList<Fox>();
// Let all foxes act.
for (Iterator<Fox> it = foxes.iterator(); it.hasNext(); ) {
Fox fox = it.next();
fox.hunt(newFoxes);
if (!fox.isAlive()) {
it.remove();
}
}
// Add the newly born foxes and rabbits to the main lists.
rabbits.addAll(newRabbits);
foxes.addAll(newFoxes);
view.showStatus(step, field);
}
