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Extends Keyword in Apex | Chapter 26 | Salesforce Developer Masterclass

Welcome to another educational episode of the Salesforce Developer Masterclass, titled "Extends Keyword in Salesforce Apex." In this video, we will delve into the extends keyword in Apex, a key feature for implementing inheritance in object-oriented programming within the Salesforce platform. Understanding the extends Keyword: The extends keyword in Apex is used to create a new class that inherits properties and behaviors from an existing class. This allows for code reuse, a hierarchical class structure, and the implementation of polymorphism. Key Concepts: Inheritance: Learn how inheritance allows a class (subclass) to inherit fields and methods from another class (superclass), enabling the reuse of existing code and the extension of functionalities. Superclass and Subclass: Understand the relationship between a superclass and its subclass, and how the subclass can override or extend the behaviors of the superclass. Using the extends Keyword: Defining a Subclass: See how to define a subclass using the extends keyword, inheriting properties and methods from a superclass. Overriding Methods: Learn how to override methods in the subclass to provide specific implementations while still leveraging the base functionality provided by the superclass. Calling Superclass Methods: Understand how to call methods from the superclass within the subclass using the super keyword, enabling you to extend or modify existing behaviors. Practical Examples: Basic Inheritance: Watch a practical example of defining a superclass and subclass, illustrating how properties and methods are inherited and overridden. Real-World Use Case: Explore a real-world use case where inheritance is used to create specialized versions of a base class, such as different types of user roles in a system with shared and unique behaviors. Best Practices: Avoid Deep Inheritance Hierarchies: While inheritance is powerful, deep hierarchies can make the code difficult to understand and maintain. Aim for a shallow and clear class structure. Use Composition Over Inheritance: In some cases, composition (having classes contain instances of other classes) can be a more flexible alternative to inheritance, providing better modularity and easier code maintenance. Document Your Code: Ensure that you document the relationships between superclasses and subclasses clearly to make the codebase more understandable for future developers. Common Pitfalls: Overusing Inheritance: Understand the risks of overusing inheritance, such as tight coupling and the potential for breaking changes in subclasses when the superclass is modified. Circular Inheritance: Avoid circular inheritance, which can cause compilation errors and logical issues in your application. By the end of this video, you will have a solid understanding of how to use the extends keyword in Apex to implement inheritance, enabling you to write more efficient, reusable, and organized code within your Salesforce development projects. Join us to enhance your Apex programming skills by mastering the extends keyword and leveraging inheritance to build powerful and maintainable applications on the Salesforce platform. If you want to continue learning Salesforce (for free), Subscribe Salesforce Makes Sense here    / @salesforcemakessense   To ensure a smooth learning experience, I have curated playlists that will help you prepare for interviews, train on specific domains and boost your Salesforce journey. 30 Scenario Based Questions:    • 30 Salesforce Scenario Based Questions   The Complete Administrator Course    • Learn Salesforce Administration for free   Learn Salesforce in Bytes - Short videos on Salesforce features    • Salesforce Bytes   Learn Salesforce With Me - Topic based Explanatory Videos    • Learn Salesforce with Me   65 Salesforce Interview Questions:    • 65 Interview Questions for Salesforce...   100 Salesforce Interview Questions:    • 100 Salesforce Interview Questions   If you would like to acknowledge my efforts and want me to continue training and mentoring, you can support me here. https://www.buymeacoffee.com/HimanshuM For any kind of questions, training & mentorship, queries & concerns, Feel free to drop a mail at [email protected] That’s all from this video. See you in the next video. Till then, breathe long and keep learning :)