How to sort an ArrayList?

Question

I have a List of doubles in java and I want to sort ArrayList in descending order.

Input ArrayList is as below:

List testList = new Arr         


        

Answer 1

Use util method of java.util.Collections class, i.e

Collections.sort(list)

In fact, if you want to sort custom object you can use

Collections.sort(List list, Comparator c) 

see collections api