Fibonacci 斐波那契數列 面向對象 java 版本 代碼

import java.util.ArrayList; public class Main { public static void main(String[] args) { ArrayList<Rabbit> Rabbitlist = new ArrayList<Rabbit>(); Rabbitlist.add(new Rabbit()); for (int i = 0; i < 20; i++) { System.out.print(Rabbitlist.size()); System.out.print(","); for (Rabbit rabbit : (ArrayList<Rabbit>) Rabbitlist.clone()) { if (rabbit.isSmall()) { rabbit.Growing(); } else { Rabbitlist.add(rabbit.Create()); } } } } } class Rabbit { boolean small; Rabbit() { small = true; } public Rabbit Growing() { small = false; return null; } public Rabbit Create() { return new Rabbit(); } public boolean isSmall() { return small; } }