1 public class Test {
2 public static void main(String[] args) {
3 int[] arr = {5, 2, 6, 8, 9, 1};
4 if (arr == null || arr.length <= 2) {
5 return;
6 }
7 for (int i = 0; i < arr.length - 1; i++) {
8 //插入排序：类似打扑克，抓一个数，判断数据在哪个位置，插入进去即可
9 for (int j = i; j >= 0 && arr[j] > arr[j + 1]; j--) {
10 swap(arr, j, j + 1);
11 }
12 }
13 for (int i = 0; i < arr.length; i++) {
14 System.out.println(arr[i]);
15 }
16 }
17
18 private static void swap(int[] arr, int i, int j) {
19 int temp = arr[i];
20 arr[i] = arr[j];
21 arr[j] = temp;
22 }
23 }
