Collections method sort that accepts a List as an argument sorts the elements of a List,which must implement the __________ interface.
A)Comparable.
B)Comparator.
C)Compare.
D)Ordering.

Question

Quizplus · Accepted Answer

The Collections method sort requires the elements of the List to implement the Comparable interface, which provides a natural ordering for the elements. This allows the sort algorithm to compare elements and arrange them in ascending or descending order. If the List does not implement Comparable, a ClassCastException will be thrown at runtime. Therefore, the best choice is A. B is incorrect because a Comparator can be used to sort a List only with the overloaded version of sort that accepts a Comparator as an argument. C and D are not valid Java interfaces.

Collections Method Sort That Accepts a List as an Argument