Sorting an ArrayList in Java - optimized version of sort(use if not asked in question)

 // import java.util.ArrayList;

import java.util.*;

// import java.util.Collections;

public class Classroom {

    public static void main(String[] args) {

       ArrayList<Integer> list = new ArrayList<>();

       list.add(2);

       list.add(5);

       list.add(9);

       list.add(6);

       list.add(8);

   

       System.out.println("List before sorted: " + list );

       Collections.sort(list);

       System.out.println("List after sorted: " + list);

       // desc order

       Collections.sort(list, Collections.reverseOrder());

       

       // Comparator - fnx logic

       System.out.println("in Desc Order: " + list);

    }

}