java.util.Collections.reverseOrder() Method


Advertisements


Description

The reverseOrder() method is used to get a comparator that imposes the reverse of the natural ordering on a collection of objects that implement the Comparable interface.

Declaration

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

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

Parameters

  • NA

Return Value

The method call returns a comparator that imposes the reverse of the natural ordering on a collection of objects that implement the Comparable interface.

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 list = new LinkedList();  
      
   // populate the list 
   list.add(-28);  
   list.add(20);  
   list.add(-12);  
   list.add(8);  
      
   // create comparator for reverse order
   Comparator cmp = Collections.reverseOrder();  

   // 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

java_util_collections.htm

Advertisements