Software Design Patterns in OOP with Java examples. Architecture principles and clean code design in OOP applications
What you will learn
23 GoF Design patterns
Creational patterns
Behavioral patterns
Structural patterns
Source code examples of each pattern in Java
Understanding the issue that each pattern supposed to solve
Checklist for implementation of each pattern
Description
From this course, you can learn GoF Design Patterns with detailed Java examples.
There are a lot of other courses on this topic. So, why would you choose exactly this course? Here are just a few reasons:
– Coding examples
To learn to program is not enough just watching videos and reading books. You also need to have a lot of practice. In this training course, you will review multiple practical tasks and coding examples which will help you learn and understand Java better.
– Open source code
We hide nothing from our students! Including the source code for the home task solutions and source code of examples that were shared during the lesson. Having the source code you can just copy and paste it to run it on your local computer to understand how things work better.
You are allowed to use all source code examples for learning purposes. This helps significantly to configure the environment and make tests work, especially in case students didn’t work with any testing framework in the past.
– Q&A support
The significant difference between the online and offline learning process is the instructor’s availability. If you are in one room with a tutor he always can help you to get understand the specific concept or to help fix your code on your computer.
In this course, we are supporting students with answers to any questions flagged in the Q&A section. In case there will be recurring questions – separate video lessons will be created to show how to address the issue.
So with this course you are not just getting video materials, code exercises, source code, access to the free mobile application without limits (which is still pretty cool, huh? 🙂 ), but you also get tutor support and answers to your questions along with this course.
– Relevant knowledge
After our team investigated other Java courses on Udemy we realized that most of them have nothing in common with real life. The information which is shared there is very old and significantly out of date. For example, the instructor teaches a framework which is not been used already for 15 years. Or instructors do stress on the programming design which is not used anymore at all!
The instructor of this course is a consultant in a top-rated IT outsourcing company and helps to bring cutting-edge solutions in IT for all his clients. Feel free to check the LinkedIn page of the instructor and check skills endorsement. More than 19 thousand people across all over the world (BTW most of them are from the top 100 companies of the world) evaluated the skills of Andrii Piatakha.
With this course, you can be sure that you will spend your time learning the right things from one of the best IT consultants in the world.
– Free mobile App without limits for our students
Knowing Java is one skill. Be able to pass interviews in the company – that is another skill 🙂 Nowadays a lot of companies use tests to select candidates on the first level of interview. We developed applications to practice skills specifically for such purposes.
In this course, we will provide you link to download our FREE mobile app for android. (soon it will be also available for iOS platforms)
The instructor of this course comes up with hundreds of tests that are used to test the knowledge of candidates. With this application, you will be well-prepared for the interview.
Also, only for our students – there is no limit on attempts to pass certification. In the course, we will tell you how to set up a special bonus code that will remove restrictions for our students inside the app.
– High concentration of useful material in each lesson
Sometimes you can notice that watching 5 minutes of our lesson is equivalent to watching another 30 minutes lesson.
This is because time spent for preparation for the lesson (script for the lesson, lesson structure) and video editing (to cut boring pieces of the lesson or time when the program loads) sometimes 10 times as much (sometimes even 20) as the final lesson duration after video editing.
Also, each topic is separated from another. In case some concept will be explained in the next lesson and you don’t need to worry about understanding this in the scope of this lesson – the instructor will make an announcement when a specific topic will be covered.
Go and try it yourself! We will appreciate your feedback.
So don’t wait! Take a look at the lessons’ preview if you still have doubts!
Buy this course today, and you will get all updates for FREE!
For those who successfully passed this training course, or for students who were recognized for asking amazing questions, there is a special offer from the IT-Bulls company! The creator of this course is IT-Bulls company CEO and Founder. We are always in search of talents to run our amazing startups together with you. Probably you always dreamed about running your startup? In this course, you will be able to find the team who will teach you how to do that and (in particular cases) will be glad to help with implementation!
Hope you enjoy this course! And remember, we appreciate all your feedback! Your feedback will help us to become even better! Your feedback will help us to create to best Java course ever!
See you at the lessons! 🙂
Content
Introduction
GoF Patterns: Overview
Creational Patterns
Structural Patterns
Behavioral Patterns
Bonus section
The Reality of Modern Java Architecture: Why This Course Matters
Let’s be real for a second—anyone can learn the syntax of Java. You can stack Overflow your way through a basic CRUD application, but the moment you’re tasked with building a scalable enterprise system, the “spaghetti” starts to fly. I’ve seen countless “senior” developers struggle because they lack a fundamental grasp of the Gang of Four (GoF) principles. This course, ‘GoF Design Patterns – Complete Course with Java Examples’, is essentially a bootcamp for your brain to start thinking in clean code design and architecture principles rather than just lines of logic.
What I appreciated most about this specific deep-dive is that it doesn’t just treat these 23 patterns as academic theories. It treats them as survival tools. We’ve all been there: staring at a massive codebase that’s impossible to test because everything is tightly coupled. This course forces you to confront the “Why” before the “How.” By the time you get through the Structural and Behavioral patterns, you start seeing the world through the lens of decoupled components and interface-driven development. It’s the difference between being a “coder” and being a System Architect.
What You Need Before Hitting Play
This isn’t a “Hello World” tutorial. To actually get your money’s worth and develop job-ready skills, you need a solid foundation. Don’t walk in here if you don’t understand OOP (Object-Oriented Programming) basics. You should be comfortable with:
- Core Java: Interfaces, abstract classes, and inheritance are the bread and butter here.
- Basic IDE proficiency: Whether it’s IntelliJ or Eclipse, you need to know your way around a debugger.
- A Problem-Solving Mindset: You need to have felt the “pain” of bad code to truly appreciate why a Strategy or Decorator pattern exists.
While the course claims to go from beginner to advanced, I’d argue it’s best suited for those who have at least six months of hands-on labs or professional experience under their belt.
Gaining an Industry-Standard Toolkit
The curriculum is a heavy-hitter when it comes to industry-standard tools and methodologies. You aren’t just reading slides; you are analyzing source code examples that mirror what you’d find in a high-level real-world project.
- UML Literacy: You’ll learn to read and think in diagrams, which is vital for career growth in senior roles.
- Refactoring Techniques: You’ll gain the ability to spot “code smells” and apply the correct Creational pattern to fix them.
- Testing for Scalability: Understanding how patterns like Dependency Injection (often related to the Factory pattern) make your code more testable.
Scaling Your Career and Salary Potential
If you’re looking for certification prep for high-level Java exams or prepping for a grueling technical interview at a FAANG-level company, this is your playbook. Design pattern questions are the “great filter” in technical interviews. Being able to explain the trade-offs between a Proxy and a Facade pattern isn’t just about showing off—it’s about proving you can manage technical debt.
For those aiming for Senior Software Engineer or Lead Developer roles, these patterns are the universal language of the industry. Mastering them is a direct path to career growth and higher compensation. You move away from being the person who closes tickets to the person who designs the systems that others build.
The Highlights: Why It Works
- The Implementation Checklists: This is the “secret sauce.” Each pattern comes with a step-by-step checklist. It’s like a pilot’s pre-flight manual—it ensures you don’t miss a crucial step when implementing a Singleton or an Observer pattern in a high-stakes environment.
- Clear Problem-Solution Mapping: The course starts with the “mess”—the problematic code—and shows you exactly how the pattern cleans it up. It makes the abstract feel very concrete.
- Comprehensive Java Coverage: It doesn’t skip the “boring” patterns. All 23 are there, ensuring you have a complete structural pattern and behavioral pattern vocabulary.
- Logic Over Syntax: It teaches you how to think. This is a job-ready skill that survives even if you switch from Java to C# or Python later in your career.
The Honest Truth: Where It Could Improve
If I have one gripe, it’s that the course can occasionally feel a bit “academic” in its delivery. While the source code examples are great, I would have loved to see even more focus on how these patterns integrate with modern frameworks like Spring Boot or Micronaut. In the real world, we rarely implement a Proxy from scratch—we use an annotation. A bit more “Pattern vs Framework” context would have made this a 10/10, but as a pure architecture principles course, it’s still top-tier.