数组引用赋值

 1 package com.java7;
 2
 3 class AssignARef {
 4     public static void main(String[] args) {
 5         int i;
 6
 7         int nums1[] = new int[10];
 8         int nums2[] = new int[10];
 9
10         for(i = 0; i < 10; i++)
11             nums1[i] = i;
12
13         for(i = 0; i < 10; i++)
14             nums2[i] = i;
15
16         System.out.print("Here is nums1: ");
17         for(i = 0; i < 10; i++)
18             System.out.print(nums1[i] + " ");
19         System.out.println();
20
21         System.out.print("Here is nums2: ");
22         for(i = 0; i < 10; i++)
23             System.out.print(nums2[i] + " ");
24         System.out.println();
25
26         nums2 = nums1; // now nums2 refers to nums1
27
28         System.out.println("Here is nums2 after assignment: ");
29         for(i = 0; i < 10; i++)
30             System.out.print(nums2[i] + " ");
31         System.out.println();
32
33         // now operate on sums1 array through nums2
34         nums2[3] = 99;
35
36         System.out.println("Here is nums1 after change through nums2: ");
37         for(i = 0; i < 10; i++)
38             System.out.print(nums1[i] + " ");
39         System.out.println();
40     }
41 }

执行结果：

Here is nums1: 0 1 2 3 4 5 6 7 8 9
Here is nums2: 0 1 2 3 4 5 6 7 8 9
Here is nums2 after assignment:
0 1 2 3 4 5 6 7 8 9
Here is nums1 after change through nums2:
0 1 2 99 4 5 6 7 8 9