java.util.Collections.reverseOrder() Method

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Description

The reverseOrder(Comparator<T>) method is used to get a comparator that imposes the reverse ordering of the specified comparator.

Declaration

Following is the declaration for java.util.Collections.reverseOrder() method.

 public static <T> Comparator<T> reverseOrder(Comparator<T> cmp) 

Parameters

cmp − This is the comparator.

Return Value

The method call returns a comparator that imposes the reverse ordering of the specified comparator.

Exception

NA

Example

The following example shows the usage of java.util.Collections.reverseOrder()

 package com.tutorialspoint; import java.util.*; public class CollectionsDemo { public static void main(String args[]) { // create linked list object LinkedList<Integer> list = new LinkedList<Integer>(); // populate the list list.add(-28); list.add(20); list.add(-12); list.add(8); // create comparator for reverse order Comparator<Integer> cmp = Collections.reverseOrder(null); // sort the list Collections.sort(list, cmp); System.out.println("List sorted in ReverseOrder: "); for(int i : list) { System.out.println(i+ " "); } } } 

Let us compile and run the above program, this will produce the following result.

 List sorted in ReverseOrder: 20 8 -12 -28