Master 3 Essential Design Patterns in 10 Minutes

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Master three essential design patterns that every developer encounters: Decorator, Command, and Adapter patterns with practical Java examples you can use immediately.

???? What You'll Learn:
Decorator Pattern: Add features without subclassing chaos
Command Pattern: Turn actions into objects for undo/queue functionality
Adapter Pattern: Bridge incompatible systems seamlessly
Real-world Java implementations you can copy-paste
When to use each pattern in system design interviews

These patterns appear in frameworks like Spring, Android UI, game engines, and microservices architecture. Perfect for intermediate developers, coding interviews, and system design discussions.

???? This is part of our **Design Patterns series** for backend engineers and system designers.

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⏱️ Timestamps
0:00 Introduction: 3 High-Impact Design Patterns
1:01 Decorator Pattern: Dynamic Feature Addition
1:59 Text Editor Example: The Subclassing Problem
2:48 Decorator Pattern Diagram & Java Implementation
4:15 Command Pattern: Actions as Objects
4:35 Remote Control Example: Decoupling Actions
5:00 Command Pattern Diagram & Java Implementation
6:51 Adapter Pattern: Bridging Incompatible Systems
7:08 Media Player Example: Legacy Integration Adapter
9:19 Real-World Applications & When to Use Each

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