Top 5 Java Design Pattern Courses for Experienced Java Developers

Hello guys, today, we'll talk about design patterns and some of the best online courses to learn design patterns in Java from scratch. If you are wondering what is a design pattern and why Java developers should learn them? then let me give you a brief overview. Design patterns are nothing but a tried and tested solutions of common programming problems, for example, the creational design patterns deal with the problems of object creation. They exist from a long time but made popular by famous Gang of four of Erich Gamma, John Vlissides, Ralph Johnson and Richard Helm in their classic 1994 book Design Patterns: Elements of Reusable Object-Oriented Software, also known as GOF design patterns. This book documented 24 design patterns which are reusable to solve common programming problems.

The original book was written using C++ and Smalltalk as examples, but since then, the design pattern has been adopted by almost every programming language e.g. Java, C#, PHP and even programming language which is not strictly object-oriented e.g. JavaScript.

The benefit of design patterns are immortal, you will find them in many frameworks, libraries, and in-built int eh programming language.

You probably use them on a daily basis even if you don't realize they are there. For example, JDK uses several of GOF design patterns e.g. Decorator is used in IO classes, Strategy is used along with Comparable and Comparator and so on.

The knowledge of OOP design principles and GOF design patterns are very important for Java developers because it enables them to write better code.

It is also important from the interview perspective, where interviewer often judges experienced Java developers with their knowledge of design patterns.

5 Courses to Learn OOP Design Patterns in Java

I have been sharing a lot of programming resources recently e.g. free books and courses on Java, Python, Git, Eclipse, and DevOps tools like Jenkins and Maven. If you are new here you can find them by doing a quick search using the Google's custom search box at the top-right corner of the page.

Today, I'll share some of the best online courses to learn Design patterns from scratch. These courses are not free but not very expensive either. You can buy them in the Udemy's flash sale for just $10.99 and sometimes even lower with just $9.99.

I have already bought over 50 courses on Node JS, Spring, Kotlin, DevOps, BigData, Java 9, and Android on Udemy's last sale.

Most of these courses will not only explain to you how these design patterns work and what problem they solved but also how to use them in the real world.

For example, I really like the example of using Strategy pattern for designing a Payment system on on Paulo Dichone's Java Design Patterns MasterClass.

Some of the courses also explain basic OOP design principles which are the basic building block of design patterns e.g. SOLID principles like Single Responsibility principle, Open-closed design principle, Liskov Substitution, Inversion of control and Dependency injection etc.

Apart from these they also cover some of the less popular but still useful principles like Law of Demeter and Delegation principles.

Experience Design Patterns In Java

This is one of the best course to learn design pattern in Java. It will teach you how to write better software by understanding common problems and applying design patterns for a better solution.

This course will teach you more than 20+ design patterns from the classic design pattern book by Gang of four, which is considered the holy bible on the subject.

For each pattern, a clear example is given to understand the problem the pattern will solve, as well as its advantages and disadvantages. You will be able to practically understand how the pattern works with the detailed included Java lessons.

After completing the course you should be able to identify common problems in your code, apply the correct design pattern, and implement a better object-oriented solution that is a lot more maintainable and readable.

Design Patterns in Java

This is another great course to learn design patterns in Java. It not only covers the GOF patterns like Command, Decorator, Adapter, Strategy, Proxy, Chain of Responsibility, Interpreter end but also covers the famous SOLID design principles which form the basis of design patterns.

This is also a very hands-on course where the author will show you how to implement a particular design pattern live on IntelliJ IDEA.

Most demos are also a single-file, so you can also download the file attached to the lesson and run it in IntelliJ IDEA, Eclipse, NetBeans or another IDE of your choice.

Overall a complete course to learn all 24 GOF patterns and SOLID design principles for writing better code.

Basics of Software Architecture & Design Patterns in Java

This course is your guide to create smart, reusable software with SOLID principles and design patterns in Java.

The course is divided into two parts, in the first part, the author talks about SOLID design principles e.g. Single Responsibility, Open-Closed, Liskov Substitution etc and how they help you to write better code.

In the second part, he talks about design patterns and how they solve the common problem. In order to use design patterns, you should be able to identify the problem and understand which pattern can help you and that's where this course excels.

In short, a good course to cover the basics of software design, architecture and design patterns in Java for writing better code.

Java Design Patterns - The Complete Masterclass

This one is a rather new course from Paulo Dichone, who has written a couple of best selling Java and Android courses e.g. Java 9 MasterClass which I have recently gone through to understand the Java 9 features.

In this course, he tackles the topic of GOF design patterns and he has done a really good job of explaining how each pattern works and how you can use them in your code.

His examples are from the real world and very relevant which helps to grasp the concepts. For example, using the Strategy pattern to implement a Payment processing engine is a great idea because you need to process payment in different form e.g. Cash, Credit Card, Coupons, Bitcoins or maybe something else.

In short, a great course for experienced Java developers and anyone who wants to learn about GOF design patterns e.g. Visitor, Adapter, Decorator etc.

From 0 to 1: Design Patterns - 24 That Matter - In Java

This is another comprehensive course to learn 24 Object-oriented design patterns from famous GOF book.

The instructors are very knowledgeable and have working experience in Google and Investment banks. They understand that design patterns are not inherently trivial at first glance, and make the effort to break things down in a way that is easily accessible.

Like first two courses, this one also covers OOP design principles as well as design patterns.

In short, a great course to start with Java design patterns and learn all 24 patterns to write better code.

That's all about some of the best online training courses to learn Java Design patterns. These courses are a great way to boost your understanding of object-oriented design and tried and tested GOF patterns. After completing these courses you know what those patterns mean and when can you use them to create better code. It will also help you to communicate your ideas to your team and fellow coders.

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