Sort a parallel array using Arrays.sort()

Question

Is it possible to sort an array using Arrays.sort() and thereafter have another related array positioned the same as the sorted array for example:

Answer 1

It is possible to use the built-in Arrays.sort to archive the effect without creating a class for the parallel array content.

Note that the index should be an object array, not primitive array. (Arrays.sort(int[]) does not take comparator)

final int n = 10;
int[] values = new int[n];
Integer[] index = new Integer[n];
par_foreach(n, i -> index[i] = i);
par_foreach(n, i -> values[i] = random.nextInt(100));
Arrays.sort(index, (a, b) -> Integer.compare(values[a], values[b]));
println("values", values);
println("index", index);
print("ordered:");
foreach(n, i -> print(" " + values[index[i]]));
println();

Remark

foreach :: Num -> (Num -> void) (parallel) par_foreach :: Num -> (Num -> void) In case you cannot imagine the implementation: https://github.com/beenotung/javalib/blob/master/src/com/github/beenotung/javalib/Utils.java