Objects Deep Dive | Size, Call by Value vs Reference | Shallow vs Deep Copy | Java Full Course #14

In this lecture, we take a deep dive into how objects actually work in Java. Understanding how objects behave in memory is critical for writing efficient and bug-free Java programs. We start by exploring what an object really is in Java and how memory is allocated for objects. Then we move into an important concept that often confuses beginners and even experienced developers: whether Java uses call by value or call by reference. Finally, we understand the difference between shallow copy and deep copy, which is extremely important when working with complex objects and avoiding unintended side effects in programs. In this lecture you will learn: What an object really contains internally How object size works in Java The difference between call by value and call by reference Whether Java is truly call by value or reference Practical examples demonstrating parameter passing The difference between shallow copy and deep copy This concept is fundamental for understanding memory management, object manipulation, and advanced Java programming. Why Learn Java? Java is one of the most powerful and widely used programming languages in the world. It is used in: Backend development Enterprise applications Android development Banking systems Large-scale distributed systems If you want to master Data Structures, Spring Boot, Microservices, or System Design, Java fundamentals are essential. Join Coder Army Whatsapp Group: https://whatsapp.com/channel/0029Va6H... Join System Design Whatsapp Group: https://whatsapp.com/channel/0029VbBF... Code and Notes: Github : https://github.com/adityatandon15/Jav... We offer paid course on Dsa, web development, blockchain, system design and GenAI. Join our Paid Course: https://strikes.in/ Coder Army: https://coderarmy.in/#home Coder Army app: https://play.google.com/store/apps/de... Connect with Aditya Tandon Instagram :   / adityatandon2   LinkedIn :   / adityatandon2   Twitter : https://x.com/adityatandon02 Timestamps: 00:00 Intro 00:30 Object deep dive 04:39 Actual size of Object 13:51 Call by Value & Reference 32:14 Is Java Call by Value or Reference ? 34:34 Shallow vs Deep Copy java objects explained, java object memory model, call by value vs call by reference java, is java call by value, shallow copy vs deep copy java, java object size explained, java memory concepts, java programming tutorial, java object internals, java interview questions objects, java oops concepts, java object reference tutorial