Java L12 – Interfaces in Java | Multiple Inheritance, Default Methods, Interface Constants
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In Java Lecture 12, we explore Interfaces — a key concept in Java for achieving abstraction and multiple inheritance.
This lecture covers everything from the basics of interfaces to handling complex scenarios like default methods, multiple interfaces, and interface constants.
⏱️ Chapters Covered:
00:00:00 - Introduction
00:00:22 - What is an Interface in Java?
00:02:53 - Implementing an Interface
00:04:31 - Interface with Multiple Methods
00:06:28 - Why Use Interfaces?
00:08:56 - Default and Static Methods in Interfaces
00:11:29 - Common Mistakes with Interfaces
00:13:28 - When to Use Interfaces?
00:14:50 - Why Use Multiple Interfaces?
00:15:37 - Implementing Multiple Interfaces (Syntax)
00:16:57 - Resolving Conflicts When Two Interfaces Have the Same Method
00:18:14 - Default Methods in Multiple Interfaces (Java 8+)
00:19:50 - Using "super" to call Default Methods from Interfaces
00:21:07 - Multiple Interfaces vs. Multiple Inheritance in C++
00:21:48 - Common Mistakes with Multiple Interfaces
00:22:22 - Are Variables Allowed in Interfaces?
00:23:20 - public static final Behaviour in Interface Variables
00:24:12 - Using Interface Constants in Implementing Classes
00:24:34 - How Interface Constants Differ from Class Variables
00:25:14 - Best Practices for Using Interface Constants
00:26:09 - Common Mistakes with Interface Variables
00:26:51 - When to Use Interface Constants?
00:27:25 - What is an Abstract Class?
00:28:48 - Key Differences Between Interfaces and Abstract Classes
00:29:07 - Choosing Between Interface and Abstract Class
00:30:22 - Multiple Inheritance with Interfaces (Java Limitation)
00:30:49 - Outro
💡 This lecture helps you understand how interfaces help in building flexible and scalable applications in Java.
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