Design Patterns for Software Developers*

Learn the most-used software design patterns and when to apply them. Get practical, real-world Java examples you can scan quickly to write cleaner, more maintainable code.

Beginner

77 Lessons

1h

Certificate of Completion

Learn the most-used software design patterns and when to apply them. Get practical, real-world Java examples you can scan quickly to write cleaner, more maintainable code.

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Explanations

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Explanations
Course Overview
Course Content

Course Overview

Strong problem-solving isn’t enough—you also need to recognize proven ways to structure real software. This mobile version breaks down key design patterns into quick, bite-sized lessons you can learn anywhere. You’ll see what problem each pattern solves, how it works, and when to use it, with practical Java snippets and real-world analogies. By the end, you’ll spot brittle design faster and build code that stays flexible, extensible, and easy to maintain.

Course Content

1.

Introduction to Design Patterns

Why Design Patterns?
The Telescoping Trap
Core Design Principle
The Three Pillars
Creational Patterns
Structure vs. Behavior
Quick Recall
Key Takeaways
2.

Creational Patterns

Constructing Complexity
The Assembly Line
The Telescoping Problem
The One and Only
Locking the Constructor
The Thread Safety Trap
Don't Build, Clone
Copy Methods
Delegating Creation
Subclassing the Logic
Factories of Factories
Factory Method vs. Abstract Factory
Creational Patterns Recap
3.

Structural Patterns

The Universal Translator
How Adapter Works
Coding the Adapter
The Bridge Pattern
Avoiding Class Explosion
Adapter vs. Bridge
The Composite Pattern
Part Equals Whole
Recursive Execution
The Decorator Pattern
Coding Decorators
The Facade Pattern
One Button to Rule Them All
The Flyweight Pattern
Intrinsic vs. Extrinsic
Visualizing Memory Savings
The Proxy Pattern
Lazy Loading Example
Why Not Subclassing?
Structural Patterns Recap
4.

Behavioral Patterns I

Behavioral Patterns: The Conductors
The Chain of Responsibility
Real World: Cockpit Warning Systems
The Command Pattern
The Magic of Undo
Invoker vs. Receiver
The Mediator Pattern
Analogy: Air Traffic Control
The Observer Pattern
Push vs. Pull Models
Identifying Observers
The Iterator Pattern
The Interpreter Pattern
Decoupling Senders from Receivers
Mediator Trade-offs
Iterator Pattern Quiz
Quick Review
5.

Behavioral Patterns II

The Time Machine Object
Snapshot Mechanics
Why not just make it public?
The If-Else Nightmare
Changing Identity
Logic in the State
The Algorithm Skeleton
Hooks vs. Fixed Steps
Pluggable Strategies
State vs. Strategy
The Visiting Inspector
Visitor Trade-offs
Behavioral Pattern Recap
6.

Conclusion

6 Lessons

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Anthony Walker

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Evan Dunbar

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Carlos Matias La Borde

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Souvik Kundu

Front-end Developer

Vinay Krishnaiah

Software Developer

Eric Downs

Musician/Entrepeneur

Kenan Eyvazov

DevOps Engineer

Souvik Kundu

Front-end Developer

Eric Downs

Musician/Entrepeneur

Anthony Walker

@_webarchitect_

Evan Dunbar

ML Engineer

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