编辑代码

public class InsertionSort {
    public static void insertionSort(int[] arr) {
        int n = arr.length;
        for (int i = 1; i < n; ++i) {
            int key = arr[i];
            int j = i - 1;
            while (j >= 0 && arr[j] > key) {
                arr[j + 1] = arr[j];
                j = j - 1;
            }
            arr[j + 1] = key;
        }
    }

    public static void main(String[] args) {
        int[] arr = {5, 2, 8, 12, 1, 6, 3};
        insertionSort(arr);
        System.out.println("Sorted array: ");
        for (int num : arr) {
            System.out.print(num + " ");
        }
    }
}