Chapter 4.1 – equals() and hashCode() Methods and Their Importance in Java

🧠 Understand equals() and hashCode() methods in Java — one of the most important interview and project concepts!

In this lecture of the Complete Java Course – From Fresher to Expert, you’ll learn how equals() and hashCode() work, why they are closely related, and how they impact object comparison, HashMap keys, and data integrity.

By the end of this video, you’ll master how to override equals() and hashCode() properly — a skill every professional Java developer must know 🚀

🔥 What You’ll Learn

The role of equals() and hashCode() in Java

How object equality works in memory (== vs equals())

Why both methods must be overridden together

Contract between equals() and hashCode()

Impact on HashMap, HashSet, and HashTable

Writing robust custom implementations

Common pitfalls and interview questions

Real-world coding demo using IntelliJ IDEA

💻 Includes hands-on examples, debugging walkthroughs, and best practices for backend developers.

🧠 About This Course

The From Fresher to Java Expert course by SPS Tech takes you from Core Java fundamentals to advanced concepts like OOP, Collections, Exception Handling, Multithreading, and JDBC — helping you become a job-ready Java Developer.

📘 Complete Java Course Playlist:
👉    • 2.5 Strings in Java Explained - Part 3  

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Do read my pick of the best basic Java interview questions:-https://sps-tech.in/interview-questions/

I recommend these books to enhance your knowledge of Java. Do check out:-

Pragmatic Programmer, The: From Journeyman to Master:- https://amzn.to/3MEIuQw
Scjp Sun Certified Programmer for Java 6 Study Guide (Exam 310 - 065) (Old Edition):- https://amzn.to/432mRPs
Docker Deep Dive: Zero to Docker in a single book:- https://amzn.to/3IoTNtz
Cloud Native Microservices with Spring and Kubernetes: Design and Build Modern Cloud Native Applications using Spring and Kubernetes (English Edition):- https://amzn.to/45dG96j
Working Effectively with Legacy Code (Robert C. Martin Series):- https://amzn.to/3MHRxjJ
Beginning Hibernate: For Hibernate 5:- https://amzn.to/3MjZ1YK
Data Structures and Algorithms Made Easy in Java:- https://amzn.to/3IrQz8v
Software Architecture in Practice (SEI Series in Software Engineering):- https://amzn.to/3MHYFN2
Java Concurrency In Practice:- https://amzn.to/3MiDeAM
Data Structures & Algorithms in Java, 2e:- https://amzn.to/433SAjq