Question

How to sort elements of ArrayList?

(a) Collection.sort(listObj);

(b) Collections.sort(listObj);

(c) listObj.sort();

(d) Sorter.sortAsc(listObj);

This question was addressed to me in an international level competition.

My query is from Data Structures-List in chapter java.util – The Collections Framework of Java

Answer 1

Right choice is (b) Collections.sort(listObj);

To explain: Collections provides a method to sort the list. The order of sorting can be defined using Comparator.