1 import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import java.util.stream.Collectors; public class App { public static void main(String[ ] args) { List<Integer> list = new ArrayList<>(List.of(5, 3, 2, 1, 4)); Collections.sort(list); System.out.println(list); // => [1, 2, 3, 4, 5] list.sort(Comparator.reverseOrder()); System.out.println(list); // => [5, 4, 3, 2, 1] list = list.stream() .sorted() .collect(Collectors.toList()); System.out.println(list); // => [1, 2, 3, 4, 5] } }