How to remove duplicate data items from List or ArrayList using Collection Framework and Stream API

Published: 25 October 2025
on channel: Silan Software

New Java Interview Question Tutorial is Live!

Have you ever wondered how to remove duplicate elements from a List or ArrayList efficiently in Java?
In this video, I’ve explained two powerful approaches —
✅ Using Java Collection Framework
✅ Using Java 8 Stream API

This is one of the most frequently asked Java Interview Questions, and mastering it will help you stand out in interviews and coding tests.
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