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Java-Comparator

21 posts

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 extracts an double sort key from a typ...read more

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Java - util package

Java-Comparator

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 long sort key from a type T, a...read more

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Java - util package

Java-Comparator

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 returned comparator by this met...read more

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Java - util package

Java-Comparator

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 sort method of the array and pa...read more

Java - util package

Java-Comparator

Comparator thenComparingLong() method in Java with examples

Last Updated: 29 April 2019

The thenComparingLong(java.util.function.ToLongFunction) method of Comparator Interface in Java returns a lexicographic-order comparator with a function that extracts a Lo...read more

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Java - util package

Java-Comparator

Comparator thenComparingDouble() method in Java with examples

Last Updated: 29 April 2019

The thenComparingDouble(java.util.function.ToDoubleFunction) method of Comparator Interface in Java returns a lexicographic-order comparator with a function that extracts ...read more

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Java - util package

Java-Comparator

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.Examples:Input: arr[] = {'126.255...read more

Java-Comparator

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[] = {"1.1.2", "0.9.1", "1.1.0"...read more

Interview Experiences

interview-preparation

Java-Comparator

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-defined objects. In java, a Comp...read more

Technical Scripter

Technical Scripter 2020

Java-Comparator

How to Fix java.lang.ClassCastException in TreeSet By Using Custom Comparator in Java?

Last Updated: 07 January 2021

This error is thrown by TreeSet because TreeSet is used to store elements in sorted order and if the specified element cannot be compared with the elements currently in th...read more

Technical Scripter

Technical Scripter 2020

Java-lang package

Java-Comparator

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 also does not allow duplicates.S...read more

Java-Comparator

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 collections. It is found in java.util...read more

Technical Scripter

Technical Scripter 2020

Java-Comparator

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 natural ordering of its keys, ...read more

Java-Comparator

Maximum number of plates that can be placed from top to bottom in increasing order of size

Last Updated: 27 January 2023

Given a 2D array plates[][] of size N, which each row representing the length and width of a N rectangular plates, the task is to find the maximum number of plates that ca...read more

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Dynamic Programming

Java-Comparator

Compare Strings for equality or lexicographical order in different programming Languages

Last Updated: 09 November 2023

Given two strings string1 and string2, the task is to check if these two strings are equal or not.Examples:Input:string1 = “GeeksforGeeks”, string2 = “GeeksforGeeks”Output...read more

Java-Comparator