Java Collection How to - Sort List in descending order using Comparator

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Question

We would like to know how to sort List in descending order using Comparator.

Answer

//from   w  w w  . j a v  a 2 s . c o  m
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

public class Main {
  public static void main(String[] args) {
    ArrayList<String> arrayList = new ArrayList<String>();

    arrayList.add("A");
    arrayList.add("B");
    arrayList.add("C");
    arrayList.add("D");
    arrayList.add("java2s.com");
    
    Comparator comparator = Collections.reverseOrder();
    System.out.println(arrayList);

    Collections.sort(arrayList, comparator);
    System.out.println(arrayList);
  }
}

The code above generates the following result.

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