Sort arrays of primitive types in descending order

double[] array = new double[1048576];
...
Arrays.sort(array);
// reverse the array
for(int i=0;i<array.length/2;i++) {
     // swap the elements
     double temp = array[i];
     array[i] = array[array.length-(i+1)];
     array[array.length-(i+1)] = temp;
}

double[] array = new double[1048576];

Arrays.sort(array,Collections.reverseOrder());

double[] arr = new double[]{6.0, 5.0, 11.0, 7.0};
List xs = Arrays.asList(arr);
System.out.println(xs.size());  // prints 1

// swap the elements
 temp = array[i];
 array[i] = array[j];
 array[j] = temp;

int[] intArr = { 1, 2, 3, 4, 5 };
float[] floatArr = { 1.0f, 2.0f, 3.0f, 4.0f, 5.0f };
double[] doubleArr = { 1.0d, 2.0d, 3.0d, 4.0d, 5.0d };
byte[] byteArr = { 1, 2, 3, 4, 5 };
short[] shortArr = { 1, 2, 3, 4, 5 };
Collections.reverse(Ints.asList(intArr));
Collections.reverse(Floats.asList(floatArr));
Collections.reverse(Doubles.asList(doubleArr));
Collections.reverse(Bytes.asList(byteArr));
Collections.reverse(Shorts.asList(shortArr));
System.out.println(Arrays.toString(intArr));
System.out.println(Arrays.toString(floatArr));
System.out.println(Arrays.toString(doubleArr));
System.out.println(Arrays.toString(byteArr));
System.out.println(Arrays.toString(shortArr));