Version 3.1 / 01.10.2021

Learning Object-Oriented Design & Programming

In software engineering, design patterns describe how to solve recur­ring design problems to design flexible and reusable object-oriented software.

w3sDesign presents the up-to-date version of the well-known GoF¹ design patterns in a compact and memory friendly way so that they can be learned and memorized as fast as possible.

New design patterns that are widely used today but not included in the original twenty-three GoF design patterns will be added. This release starts with the Dependency Injection design pattern, and others will follow in next releases.

By working through individual design patterns, you will learn how to design objects that are easier to implement, change, test, and reuse.
Simple, ready-to-run code samples show how to implement design patterns by using object-oriented programming languages such as Java.

At w3sDesign you will find all you need to know, and you will get the skills that software developers need today.

It's all for free, and it's pretty fast. Enjoy it!

New Edition! GoF Design Patterns Certification
Raise your career and get certified!

¹  Design Patterns: Elements of Reusable Object-Oriented Software.
    Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides.
    Published October 1994. Copyright © 1995 by Addison-Wesley.
    (The authors of the book are commonly referred to as "GoF" or "Gang of Four".)