HashMap vs HashSet in Java 🔥 | Internal Working, Code Examples & Interview Concepts in Hindi

#HashMap #HashSet #JavaInterview #DataStructures #JavaInHindi #DSATutorial #CodingInterview #JavaHashing #InterviewPreparation #DSAinJava #SystemDesign

📥 Class Notes:
https://drive.google.com/file/d/1lDNq3GPcbvIJocz0sEyh1kUOJwiPDug_/view?usp=sharing

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In this video, you will deeply understand the HashMap and HashSet concepts in Java, how they work internally, and why they are crucial for coding interviews and system design.

🧠 Topics Covered

What is HashMap and how it works

How hashing and collision handling happen

Internal memory allocation of HashMap

Load factor, rehashing & performance

What is HashSet and how it uses HashMap

Code examples with real-world use cases

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00:00 Introduction
00:45 What is Hashing and Mapping
01:30 What is HashMap
02:20 Syntax of HashMap in Java
03:40 Adding key-value pairs
05:20 Retrieving values from HashMap
06:45 Handling missing keys and defaults
08:10 Internal memory & space allocation
10:30 Hashing algorithm explained
12:20 Collision and LinkedList handling
14:10 Threshold and rehashing
16:00 What is HashSet
17:00 Syntax and Code for HashSet
18:30 Set and uniqueness concept
19:40 How HashSet uses HashMap internally
21:00 Tree conversion and performance
22:30 Internal capacity and load factor
23:30 Summary and conclusion

Видео HashMap vs HashSet in Java 🔥 | Internal Working, Code Examples & Interview Concepts in Hindi канала Interview Ready Squad