Sort List in reverse in order

Question

I have List list1 in direct order. List list = Ordering.natural().sortedCopy(asu2);

How to change order. And I don\'t know how to rewrite

Answer 1

you can reverse any type by just putting "-" or negative sign infront of your return.

Collections.sort(listed, new Comparator<Object>() {

    @Override
    public int compare(Object o1, Object o2) {

        return -o1.getLeft().compareTo(o2.getLeft());

    }
});

Answer 2

Collections.reverse(List) reverses the given list in place. You can also use Guava's Lists.reverse(List) to create a view backed by the given list that is in reverse order without copying it or modifying the original list.

And if you just want to create a list that is sorted in the reverse of the natural order, see @assylias's answer about Ordering.natural().reverse().

Answer 3

list.sort(Comparator.reverseOrder());

Answer 4

To reverse the order of items in List you can use Collections.reverse(List<?> list)

Answer 5

There is a method reverseOrder in the Collections class which returns a Comparator.

You can use it like Collections.sort(list, Collections.reverseOrder());

Answer 6

If you want to sort the list in reverse natural order, guava's Ordering has a reverse method:

List<String> list = Ordering.natural().reverse().sortedCopy(asu2);