Java-Comparator

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Sort Java Vector in Descending Order Using Comparator

Last Updated: 27 January 2021

The Vector class implements a growable array of objects. Vectors basically fall in legacy classes but now it is fully compatible with collec ...read more

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Java Program to Sort Keys in TreeMap by using Comparator with User Defined Objects

Last Updated: 04 October 2021

The TreeMap in Java is used to implement Map interface and NavigableMap along with the AbstractMap Class. The map is sorted according to the ...read more

Creating TreeSet with Comparator by User Define Objects in Java

Last Updated: 17 May 2021

TreeSet is the implementation class of Set Interface. It follows a natural sorting order or you can customize it using a comparator and it a ...read more

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Sort ArrayList in Descending Order Using Comparator in Java

Last Updated: 13 July 2022

A comparator is an interface that is used to rearrange the ArrayList in a sorted manner. A comparator is used to sort an ArrayList of User-d ...read more

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Sort an Array of Version Numbers

Last Updated: 26 December 2023

Given an array of strings arr[], consisting of N strings each representing dot separated numbers in the form of software versions.Input: arr ...read more

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Sort the given IP addresses in ascending order

Last Updated: 12 April 2023

Given an array arr[] of IP Addresses where each element is a IPv4 Address, the task is to sort the given IP addresses in increasing order.Ex ...read more

Comparator comparingDouble() method in Java with examples

Last Updated: 29 April 2019

The comparingDouble(java.util.function.ToDoubleFunction) method of Comparator Interface in Java accepts a function as parameter that extract...read more

Comparator comparingLong() method in Java with examples

Last Updated: 29 April 2019

The comparingLong(java.util.function.ToLongFunction) method of Comparator Interface in Java accepts a function as parameter that extracts an...read more

Comparator naturalOrder() method in Java with examples

Last Updated: 29 April 2019

The naturalOrder() method of Comparator Interface in Java returns a comparator that use to compare Comparable objects in natural order. The ...read more

Comparator reversed() method in Java with examples

Last Updated: 05 February 2021

The reversed() method of Comparator Interface in Java returns a comparator that imposes the reverse ordering of this comparator. If you use ...read more

Comparator reverseOrder() method in Java with examples

Last Updated: 12 April 2023

The reverseOrder() method of Comparator Interface in Java returns a comparator that use to compare Comparable objects in reverse of natural ...read more

Comparator comparingInt() in Java with examples

Last Updated: 29 April 2019

The comparingInt(java.util.function.ToIntFunction) method accepts a function as parameter that extracts an int sort key from a type T, and r...read more

Comparator nullsFirst() method in Java with examples

Last Updated: 29 April 2019

The nullsFirst(java.util.Comparator) method returns comparator that is a null-friendly comparator and considers null values to be less than ...read more

Comparator nullsLast() method in Java with examples

Last Updated: 29 April 2019

The nullsLast (java.util.Comparator) method returns comparator that is a null-friendly comparator and considers null values greater than non...read more

Java Comparable vs Comparator

Last Updated: 16 April 2025

In Java, both Comparable and Comparator are used for sorting objects. The main difference between Comparable and Comparator is:Comparable: I ...read more

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