数组的声明与创建

 1 package com.pingfan.array;
 2 
 3 public class ArrayDemo1 {
 4     public static void main(String[] args) {
 5         int[]nums;//1.声明一个数组
 6         nums = new int[10];//2.创建一个数组
 7         //3.给数组元素中赋值
 8         nums[0] = 1;
 9         nums[1] = 2;
10         nums[2] = 3;
11         nums[3] = 4;
12         nums[4] = 5;
13         nums[5] = 6;
14         nums[6] = 7;
15         nums[7] = 8;
16         nums[8] = 9;
17         nums[9] = 10;
18         //计算所有元素的和
19         int sum = 0;
20         //获取数组长度：arrays.length
21         for (int i = 0; i < nums.length; i++) {
22             sum = sum +nums[i];
23             
24         }
25         System.out.println("总和为：" + sum);
26     }
27 }