sort arrays obsolete forms disrespectful order

i've got large array obsolete forms (double).
how i arrange elements descending order?

unfortunately java api doesn't support classification obsolete forms comparator.

the initial proceed substantially comes mind modify list objects (boxing):

double[] array = new double[1048576];    
arrays.stream(array).boxed().sorted(collections.reverseorder())

however, fighting any obsolete array too delayed causes lot gc pressure!

another proceed arrange following reverse:

double[] array = new double[1048576];
...
arrays.sort(array);
// shelter array
for (int i = 0; i < array.length / 2; i++) {
     // barter elements
     double temp = array[i];
     array[i] = array[array.length - (i + 1)];
     array[array.length - (i + 1)] = temp;
}

this proceed also slow - quite array already sorted definitely well.

what's improved alternative?