数组拷贝的几种方法-蒲公英云

数组拷贝的几种方法

1 /**
 2  * @author zhengbinMac
 3  */
 4 public class Test {
 5     public static void main(String[] args) {
 6         int[] array1 = {1,2,3,4,5};
 7         // 1.通过for循环
 8         int[] array2 = new int[5];
 9         for(int i = 0;i < array1.length;i++) {
10             array2[i] = array1[i];
11         }
12         for(int i = 0;i < array2.length;i++) {
13             System.out.print(array2[i]);
14         }
15         System.out.println();
16         //2.通过System.arraycopy()
17         int[] array3 = new int[5];
18         System.arraycopy(array1, 0, array3, 0, 5);
19         for (int i = 0; i < array3.length; i++) {
20             System.out.print(array3[i]);
21         }
22         System.out.println();
23         //3.通过Arrays.copyOf()
24         int[] array4 = new int[5];
25         array4 = Arrays.copyOf(array1, 5);
26         for (int i = 0; i < array4.length; i++) {
27             System.out.print(array4[i]);
28         }
29         System.out.println();
30         //4.通过Object.clone()
31         int[] array5 = new int[5];
32         array5 = array4.clone();
33         for (int i = 0; i < array5.length; i++) {
34             System.out.print(array5[i]);
35         }
36     }
37 }