java实现Fibonacci算法实例

package com.yenange.test2; import java.util.Scanner; public class Fibonacci {   private static Scanner input = new Scanner(System.in);   public static void main(String[] args) {     System.out.println("-----------第1种算法------------");     int num1 = 1;     int num2 = 1;     int temp, count;     System.out.println("请输入要查询的是第几个数(>=2):");     count = input.nextInt();    System.out.println("第1个数是:1");     System.out.println("第2个数是:1");     for (int i = 3; i <= count; i++) {       temp = num2;       num2 += num1;       System.out.println("第" + i + "个数是:" + num2);       num1 = temp;     }    System.out.println("-----------第2种算法------------");     System.out.println("第" + count + "个数是:" + cal(count));    System.out.println("-----------第3种算法------------");     int[] arr = new int[count];     arr[0] = 1;     arr[1] = 1;     for (int i = 2; i < arr.length; i++) {       arr[i] = arr[i - 1] + arr[i - 2];       System.out.println("第" + (i + 1) + "个数是:" + arr[i]);     }   }  static int cal(int count) {     if (count <= 2) {       return 1;     }     return cal(count - 1) + cal(count - 2);   } }