java 递归

package fangzao.www;public class test{        public static void main(String[] args) {            test e = new test();         // System.out.println();            System.out.println("结果是"+e.Test(5));        }            public double Test(double index) {            if (index == 1) {                return 1;            }            if (index == 2) {                return 1;            }            //double namber=Test(index-1) + Test(index - 2);           System.out.println(index);                        return Test(index-1) + Test(index - 2);        }    }