/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
 
    final Integer[] arr =
    { 12, 67, 1, 34, 9, 78, 6, 31 };
    final Integer[] perm = new Integer[arr.length];
    for (int i = 0 ; i != perm.length ; i++) {
        perm[i] = i;
    }
    Arrays.sort(perm, new Comparator<Integer>()
    {
        @Override
        public int compare(Integer x, Integer y)
        {
            return arr[x] - arr[y];
        }
    });
 
    System.out.println("low to high:" + Arrays.toString(perm));
 
	}
}

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