Collections Set — Uniqueness, Hashing, and Ordering
Автор: Eye Of A Hero
Загружено: 2026-02-08
Просмотров: 1
Описание:
In this video we introduce the *Set interface* in the Java Collections Framework and finally answer the question: why does Java even need Sets if we already have Lists?
You’ll learn how Sets enforce **uniqueness**, how Java determines duplicates using `equals()` and `hashCode()`, and why Sets are critical in real applications like login systems, caching, permissions, and graph traversal.
We compare *HashSet vs LinkedHashSet vs TreeSet* and clearly show when to use each:
• HashSet → fastest
• LinkedHashSet → preserves insertion order
• TreeSet → automatically sorted
The lesson also includes a live Eclipse demo showing duplicates being rejected and automatic sorting happening in real time.
Perfect for beginner and intermediate Java developers, CS students, and interview prep.
#Java #JavaCollections #Set #HashSet #TreeSet #LinkedHashSet #DataStructures #OOP #Programming #LearnJava #SoftwareEngineering #CodingInterview #TechInterview #ComputerScience #JavaDeveloper #Algorithms #STEM #Developers
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