Kotlin – Sort List of Objects with Kotlin Comparator Example

https://grokonez.com/kotlin/kotlin-sort-list-objects-kotlin-comparator-example

Kotlin – Sort List of Objects with Kotlin Comparator Example

This tutorial shows you way to Sort List of Objects by implementing Comparator example.

Related posts:

• Kotlin – Compare Objects with Comparable Example
• Kotlin – Sort List of Objects with Comparable
• Kotlin Sort Object List with Kotlin Selector function – crossinline selector: (T) -> R?
• Kotlin Comparator Binary Search for Object List

I. Technology

• Java 1.8
• Kotlin 1.1.2

  II. Overview

  1. Goal

  Sort list of three MyDate(year,month,day) objects.

  2. Steps to do

• Implement Comparator interface for the class that you use for handling sorting.
• Override compare(object1: T, object2: T) method and:
• return zero if object1 is equal object2
• a negative number if object1 is less than object2
• a positive number if object1 is greater than object2
• Use sortedWith(comparator: Comparator) method that returns a List.

  III. Practice

  1. Create Class for objects to be sorted

  
  package com.javasampleapproach.objcomparator

data class MyDate (val year: Int, val month: Int, val day: Int) {

}

More at:

https://grokonez.com/kotlin/kotlin-sort-list-objects-kotlin-comparator-example

Kotlin – Sort List of Objects with Kotlin Comparator Example