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Java Code Geeks's title: Java Programming, Learn Java Online with the Java Code Geeks | Java developers resource center - Java, Scala, Groovy, Android

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The Neuroscience of Debugging: What Brain Scans Reveal About Problem-Solving in Code

Every developer knows the feeling: you’ve been staring at the same bug for hours, getting nowhere. Then you take a walk, grab coffee, or even sleep on it—and suddenly the solution appears, obvious in hindsight. This isn’t magic. It’s neuroscience. For decades, we’ve treated programming as a purely logical discipline, something that happens between the ...


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Getting Started with JUnit 5 Testing in Micronaut

Micronaut makes testing Java applications straightforward with native JUnit 5 integration. Its lightweight dependency injection, embedded server support, and simple mocking allow us to write fast unit and integration tests with minimal setup. In this article, we’ll cover how to configure JUnit 5 in a Micronaut project and demonstrate test cases for services and controllers. …


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Handling Null Values with MapStruct

MapStruct is a compile-time code generation framework that simplifies mapping between Java beans by eliminating boilerplate conversion code and relying on type-safe, generated implementations. One of the most common challenges in real-world applications is handling null values correctly while mapping objects—especially in scenarios involving partial updates, DTO-to-entity conver...


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Metaprogramming as Art: The Aesthetics of Code That Writes Code

There’s something magical about code that writes itself. Metaprogramming—the practice of writing programs that manipulate other programs—sits at the intersection of engineering and artistry, power and responsibility, elegance and danger. When you write metaprogramming code, you’re not just solving a problem. You’re creating a tool that creates solutions. ItR...


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Quantum Thinking for Classical Problems: Non-Deterministic Approaches to Deterministic Code

You don’t need a quantum computer to think like one. The principles that make quantum computing powerful—superposition, entanglement, probabilistic reasoning—can transform how we approach classical programming problems. Quantum computing sounds exotic, reserved for physicists in labs cooled to near absolute zero. But strip away the hardware requirements, and you’re l...


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