52. Java Inheritance: Single vs. Multi-Level Explained (Write Cleaner Code)

Write cleaner, smarter, and more efficient Java code by mastering Inheritance! 🚀
In this video, we break down one of the most critical pillars of Object-Oriented Programming (OOP): Inheritance. Whether you are preparing for a technical interview or just want to improve your coding logic, this guide explains how to avoid rewriting code by creating logical chains of classes.
👇 What You’ll Learn in This Video:
• The Core Concept: Understand how inheritance allows new classes to "absorb" features from existing ones, creating an "is-a" relationship (like how a Dog is an Animal).
• The "Family Tree" Analogy: Visualizing code flow from Grandparent to Father to Son.
• Single-Level Inheritance: We build a basic Calculator and extend it into an Advanced Calculator using the extends keyword.
• Multi-Level Inheritance: We take it a step further by building a Scientific Calculator that inherits cumulatively from the entire chain.
• Why It Matters: Learn how this structure makes code maintenance easier—fix a bug in the parent class, and it automatically fixes the child classes!.
Key Concepts Covered:
• Superclass (Parent) vs. Subclass (Child).
• The extends keyword syntax.
• Code reusability and maintenance.

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