java

Java Foundations: Comprehensive

The complete Java onboarding. Master syntax, OOP, TDD, and functional Streams through five days of intensive Active Learning.

Expected Outcome

Full proficiency in writing professional Java code with built-in quality through unit tests and modern language patterns.

Target Audience

Junior developers, new hires, or teams needing a thorough and architecturally sound walkthrough of Java 21/25.

Prerequisites

Basic understanding of logic and simple programming is recommended to get the most out of the course.

Curriculum & Highlights

Modern Java 21 & 25 Syntax
OOP, Inheritance & Interface Design
TDD & Unit Testing with JUnit 5
Streams API & Functional Java
Deep Dive into Collections Framework
Maven Project Structure & Lifecycle
Records, Enums & Sealed Classes
Error Handling & Exception Strategies

Challenges we address

"How is testable code written using TDD and JUnit 5 as a natural part of the development process?"

"How are the Collections Framework and Generics mastered to handle data professionally?"

"How is the transition made from basic loops to declarative programming using modern Streams and Lambdas?"

Detailed Description
Building a sustainable career in Java requires an understanding that reaches deep into the language's mechanisms and professional standards. This five-day course is Actlea's most comprehensive foundational training, designed to eliminate knowledge gaps and establish a unified high standard of quality within the development team from day one. Through Active Learning, theory is balanced with extensive practical exercises where applications are built from scratch. The module goes beyond simple syntax to focus on structuring code that is readable, testable, and ready for the demands of modern Enterprise environments. Upon completion, participants transition from coders to Java developers who can confidently navigate complex codebases and contribute effectively to the organization's delivery goals. The challenge of code quality is addressed by integrating TDD and JUnit 5 as a natural part of the workflow, ensuring logic is verified from the start. By mastering the Collections Framework and Generics, efficient data handling solutions are created, replacing traditional imperative loops with declarative Streams and Lambdas for increased clarity. To build future-proof systems, modern patterns are implemented with Records and Sealed Classes, while using Maven for a professional structure and for handling the project lifecycle. Actlea's core philosophy rests on the insight that fundamental knowledge is the single greatest enabler of future velocity; shortcuts in basic training quickly turn into expensive technical debt. Experience shows that when a developer understands the 'why' behind object orientation and functional patterns, both precision and job satisfaction increase. This training is not just a walkthrough of Java 21/25, but an investment in the craftsmanship required to build tomorrow's large-scale systems.
Recommendation & Next Steps

With solid craftsmanship as a foundation, the next natural step is mastering the ecosystem's powerhouse in 'Spring Boot Jumpstart: Essentials'.

Format Expert Course
Duration 5 days
Level Foundational
Instructor Andreas Olsson
Price per group On Request

Pricing is based on scope and number of participants. Both remote and onsite delivery is available.

Tech Stack
Comprehensive Java 21 Java 25 TDD JUnit 5 Foundations
Andreas Olsson

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.

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Enterprise teams trained by Actlea

Academic Work
Handelsbanken
Scania
Swedbank
CGI
SEB
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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Book a single workshop, a multi-day course, or a complete training package. The programs are built on proven standard modules of high technical quality, designed to be deployed immediately without lengthy preparation.

  • Expert-led training: Designed for professional development teams.
  • Standardized quality: Proven modules ready for immediate delivery.
  • Flexible formats: Execution is handled remote or onsite.

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