"Incredibly educational days with Andreas as a Java teacher. He has extensive knowledge of everything from the older Java versions to the newer ones. Andreas is very good at explaining programming languages in detail and in a way that is easy to understand most of the time! The lessons how challenging and fun that really made one think and train one's problem solving skills. In addition, Andreas has good pedagogy and is very responsive and helpful when you need help. Can strongly recommend Andreas as a teacher of Java and programming in general!"
java
Java Jumpstart: Essentials
Master Java's core: from the JVM and encapsulation to deep object-orientation, Collections, and error handling.
Expected Outcome
You can build robust, object-oriented applications using secure class hierarchies, HashMaps, and Try-Catch.
Target Audience
For developers from other languages (for example C#, Python, JS) wanting to quickly code professional Java.
Prerequisites
Programming experience from another language is required, but no prior Java knowledge is necessary.
Curriculum & Highlights
→ Classes, Objects & Encapsulation
→ Polymorphism & Inheritance
→ Interfaces & Clean Code
→ Collections (List & HashMap)
→ Error Handling & Try-Catch
→ Flow Control & Enums
→ JVM & Memory Management
Challenges we address
"How do you encapsulate data and build secure classes that protect their own state?"
"How do you use polymorphism (inheritance and interfaces) to build dynamic architecture?"
"How do you store data efficiently with HashMap and handle crashes using Exceptions?"
Detailed Description
Learning a new language is often about quickly becoming productive, but without a guided walkthrough of Java's structure, it's easy to miss the conventions that make the language so powerful. In large Enterprise systems, this technical debt quickly leads to fragile applications, where debugging takes unnecessary time away from modern feature development.
This workshop eliminates the learning curve through Active Learning where we code extensively throughout the day in two parallel domains (a restaurant system and a hotel system). Together, we build a complete and secure architecture from the ground up. We move from understanding the JVM and strict encapsulation, all the way to advanced object-orientation with polymorphism, efficient Collections, and structured error handling.
Throughout the day, we dive deep into how inheritance (extends) and interfaces (implements) are used to replace rigid if-statements with a dynamic and extensible architecture. We apply Java's Collections Framework to manage data in dynamic lists and build lightning-fast key lookups using HashMap. By integrating try-catch and building custom Exceptions, we establish Clean Code patterns that you can take directly into production.
Actlea's core philosophy is that a solid understanding of object-oriented patterns is the foundation for all successful software development. Experience shows that the ability to structure logic into well-defined classes is what defines a professional developer in 2026. Mastering these fundamental patterns is the single most important prerequisite for the team to later take advantage of modern architectural choices in Java 21 and 25.
Recommendation & Next Steps
Once these object-oriented foundations are solid, the next natural step is to level up with 'Modern Java Fast-Track'. →
Format Workshop
Duration 1 day
Level Foundational
Instructor Andreas Olsson
Price per group $2,900
Standard price per group (up to 12 participants) for remote delivery. Additional costs apply for onsite delivery.
Tech Stack
Java OOP Polymorphism Collections Exceptions Foundations
Your Instructor
Andreas Olsson
Expertise through Active Learning
Java and the Spring Framework have been my core focus for over 20 years. Today, my mission is primarily to help organizations step into the future by integrating intelligent agents and AI-driven features into modern Java systems.
Actlea stands for Active Learning – the philosophy that programming is best learned by writing code, not by watching slides. My workshops focus on intensive, hands-on exercises designed to solve real-world problems.
I deliver proven training concepts globally across all timezones. While I specialize in remote delivery, I love to travel for onsite workshops. My modules are ready for immediate impact but can be tailored to your team's specific requirements.
Java • Spring Boot • Spring AI
Enterprise teams trained by Actlea
Participant Reviews
What past participants say
Read about the pedagogical approach, the hands-on labs, and the impact on daily work.
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Take the next step Ready to elevate your
Ready to elevate your
team's expertise?
Book a single workshop, combine modules into a package, or plan a full-scale bootcamp. My training is built on proven standard modules, ready to be delivered immediately to your team, regardless of your location.
- ✔Expert standard modules for senior teams
- ✔Global delivery across all time zones
- ✔Fixed group rate for up to 12 participants (remote)
- ✔Flexible delivery: Remote or On-site
Get in touch for a quote or to discuss availability.