How to find the permutation of a sort in Java

Question

I want to sort an array and find the index of each element in the sorted order. So for instance if I run this on the array:

[3,2,4]

I\'d ge

Answer 1

import java.util.*;
public class Testing{
   public static void main(String[] args){
       int[] arr = {3, 2, 4, 6, 5};
       TreeMap map = new TreeMap();
       for(int i = 0; i < arr.length; i++){
            map.put(arr[i], i);
       }
       System.out.println(Arrays.toString(map.values().toArray()));
   }
}