25 Object-Oriented Design Patterns by Yalco

Name: 25 Object-Oriented Design Patterns by Yalco
Rating: 4.6 (3 reviews)

You will learn various ways to design software in an object-oriented manner through the 25 patterns of OODP.

Created byCoding with Yalco

Last updated 2/2025

English

What you'll learn

Key principles of object-oriented programming
25 object-oriented design patterns
Advanced skills utilizing object-oriented languages
Flexible and highly reusable software design

Course content

2 sections • 30 lectures • 2h 59m total length

Indroduction2:01
Explore how object oriented design patterns organize proven solutions to real-world problems, enabling cleaner, maintainable code and effective teamwork by leveraging inheritance, polymorphism, and encapsulation.
Concept of Object-Oriented Programming16:43
Explore the core concepts of object oriented programming, including classes, objects, attributes, and methods, and learn how encapsulation, inheritance, abstract classes, and interfaces shape reusable, modular designs.
SOLID Principles11:36

Example Codes0:23
Facade Pattern6:05
Explore the facade pattern in object oriented design patterns, with Java examples, showing a single interface that coordinates subsystems like smart home devices and file operations.
Strategy Pattern5:04
Template Method Pattern5:00
Singleton Pattern7:42
Understand the singleton pattern, which ensures one instance via a private constructor, a static instance field, and a GetInstance method, used to share theme color across UI elements.
State Pattern5:15
Learn the state pattern, where each state is an object with open and close methods, demonstrated on a door and a video player, transitions replace conditionals.
About UML Diagrams2:39
Adapter Pattern5:11
Explore the adapter pattern that lets old message sender classes work with modern interfaces by converting inputs through an adapter, including usb, hdmi, and vga.
Bridge Pattern5:08
Factory Method Pattern6:00
Proxy Pattern6:22
Demonstrate the proxy pattern by using a proxy to lazily load heavy objects and enforce security criteria. See real image and bank account examples, with access control for withdrawals.
Observer Pattern4:06
Flyweight Pattern4:50
The flyweight pattern saves memory by sharing a single instance for identical data, using a hashmap to reuse books by title and fonts by a font-size-color key.
Mediator Pattern5:22
Explore the mediator pattern, introducing a central mediator that coordinates communication to reduce object coupling, demonstrated via a chatroom and an airport control tower example.
Abstract Factory Pattern5:31
Visitor Pattern6:42
Builder Pattern6:49
Decorator Pattern7:28
Command Pattern5:34
The command pattern turns operations into objects, enabling execution, undo, and redo via an invoker, with a light as receiver and concrete on/off commands.
Memento Pattern4:52
Explore the memento pattern, saving and restoring an object's internal state as snapshots through originator, memento, and caretaker, with examples from game saves and editor undo.
Prototype Pattern4:42
Explore the prototype pattern by cloning a prebuilt object to avoid heavy creation costs, duplicating templates and documents through a clone method and a prototype interface.
Chain of Responsibility Pattern4:45
Composite Pattern6:00
Explore the composite pattern, modeling part-whole hierarchies with leaves and composites in a tree structure, using file systems and UI components to add, remove, and render elements.
Interpreter Pattern7:41
Explore the interpreter pattern by parsing expressions and evaluating them with an interpret method, including numeric, add, and subtract expressions, and applying sql-like select with where.
Publisher Subscriber Pattern6:43
Iterator Pattern7:24
Explore the iterator pattern by implementing simple iterators over lists and complex structures like a file system, using hasnext and next to traverse depth first and breadth first orders.
Specification Pattern5:50
Discover how the specification pattern lets you build reusable, composable rules to test objects against conditions, combine them with and/or/not, and filter products by category, price, and stock.

Requirements

Basic knowledge of Java (recommended) or other object-oriented languages

Description

You've probably seen self-defense or Jiu-Jitsu technique demonstration videos on YouTube.

By carefully observing Jiu-Jitsu content, you can learn how to subdue an opponent or defend yourself by leveraging various aspects of the human body, like joints, the principle of leverage, and the center of gravity. Watching these techniques, which utilize the structure and mechanics of the body, you might think, "I've used my body all my life, but I never realized it could do this."

While not as intricate as the human body, object-oriented programming languages provide complex features beyond simply using classes and objects. Concepts like inheritance, polymorphism, and encapsulation are often challenging to apply effectively in practice. As a result, many people end up using object-oriented languages, like Java, in a procedural manner, simply because they don’t know how to make full use of these features.

By learning object-oriented design patterns, you’ll discover how to utilize the complex features of object-oriented languages effectively in real-world scenarios. Design patterns offer ways to solve complex problems more easily and make coding and maintenance much simpler. Just as learning techniques in Jiu-Jitsu enables you to use them as needed, learning design patterns helps you apply object-oriented features more effectively in practical situations.

Who this course is for:

Those interested in object-oriented design
Beginner developers aspiring to grow into advanced developers

25 Object-Oriented Design Patterns by Yalco

What you'll learn

Explore related topics

Course content

Introduction3 lectures • 30min

Design Patterns27 lectures • 2hr 29min

Requirements

Description

Who this course is for: