[20-04-26][Self-test 3]Java Narcissistic Number

 1 package test_1_3;
 2 
 3 public class NarcissisticNumber {
 4 
 5     public static void main(String[] args) {
 6         
 7         /** 打印出所有的”水仙花数”，所谓”水仙花数”是指一个三位数，其各位数字立方和等于该数本身。*/
 8         
 9         System.out.println("水仙花数有：");
10         for (int i = 100; i < 1000; i++) {
11             if (isNracNum(i) == true) {
12                 System.out.print(i + "   ");
13             }
14         }
15         
16     }
17 
18     private static boolean isNracNum(int num) {
19         
20         int num1 = num % 10;
21         int num2 = num / 10 % 10;
22         int num3 = num / 100;
23         
24         if (Math.pow(num1, 3) + Math.pow(num2, 3) + Math.pow(num3, 3) == num) {
25             return true;
26         }
27         
28         return false;
29     }
30 
31 }