Java中排序后将元素的索引保留在数组中

import java.util.Arrays;

public class ArrayIndexSort {
    public static void main(String[] args) {
        int[] array = {5, 2, 8, 1, 9};
        int[] sortedIndexes = sortIndexes(array);
        
        System.out.println("原始数组：");
        System.out.println(Arrays.toString(array));
        
        System.out.println("排序后的索引数组：");
        System.out.println(Arrays.toString(sortedIndexes));
    }
    
    public static int[] sortIndexes(int[] array) {
        int[] indexes = new int[array.length];
        
        for (int i = 0; i < array.length; i++) {
            indexes[i] = i;
        }
        
        Arrays.sort(indexes, (a, b) -> Integer.compare(array[a], array[b]));
        
        return indexes;
    }
}

原始数组：
[5, 2, 8, 1, 9]
排序后的索引数组：
[3, 1, 0, 2, 4]