10) Comparator vs Comparable in Java | Sort List, Custom Logic & Lambda Explained

Veröffentlicht am: 10 November 2025
auf dem Kanal: Deepanshu Rohilla

Learn how sorting works in Java — from simple lists to advanced custom sorting logic using Comparator and Comparable.
This tutorial covers everything you need to know about sorting collections in Java, including Collections.sort(), custom comparators, and lambda expressions for clean and modern code.

🚀 In this Java Sorting Tutorial, you’ll learn:

How to use Collections.sort() to sort a List in Java

The internal logic behind sorting (compare and swap explained)

How to create your own Comparator for custom sorting

Sorting numbers by last digit or custom rule

Sorting custom objects (like Student class) by age, name, or any field

Difference between Comparator vs Comparable

How Comparable lets objects compare themselves

How to simplify sorting using Lambda Expressions

Interview tips on Comparator & Comparable (commonly asked in Java interviews)

💡 Real-World Example:
We’ll sort a list of students based on their age using both Comparable and Comparator, then rewrite it using a single-line Lambda!

🧠 You’ll Understand:

✔ When to use Comparator
✔ When to use Comparable
✔ How to sort Lists, Custom Classes, and Strings by Length
✔ How to write concise, readable sorting code in Java 8+

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