Java Blog
Practical Java tutorials written by engineers. Core Java, Spring Boot, Algorithms, Design Patterns and more — all with runnable code examples.
Java 8
Java tutorials and articles about Java 8.
Algorithms
Algorithms aren't just for interviews — though they'll absolutely come up there. Understanding how to think about time and space complexity changes how you write production code. These guides break down data structures and algorithms in Java with real explanations, not just code dumps.
Core Java
Most Java developers who struggle with Spring or interviews have the same root problem — shaky fundamentals. These tutorials go deep on the concepts that actually matter: memory, OOP, serialization, and the parts of Java most tutorials skip over.
Design Patterns
Design patterns give you a shared vocabulary for solving problems that every developer runs into eventually. These tutorials focus on patterns you'll actually use — not an exhaustive catalog, but the ones that keep showing up in codebases, code reviews, and interviews.
Java Collections
You use collections in almost every Java program you write. Getting comfortable with ArrayList, HashMap, HashSet, and the rest — and knowing which one to reach for — is one of those skills that quietly makes everything else easier. These articles cover the practical side: performance trade-offs, common mistakes, and the questions that come up in interviews.
Java Concurrency
Concurrency is one of the harder parts of Java to get right — the bugs are subtle, they don't always reproduce, and the consequences in production can be serious. These guides cover the tools Java gives you (locks, semaphores, thread pools, concurrent collections) and more importantly, how to use them without shooting yourself in the foot.
Java Interviews
Java tutorials and articles about java interviews.
Java Optional Series
NullPointerException is one of the most common runtime errors in Java — and Optional was introduced specifically to push developers toward handling absent values explicitly. This series covers Optional properly: not just the API, but when to use it, when not to, and the patterns that look clever but cause problems in production.
Spring
Spring Boot is what most Java jobs actually use day-to-day. These guides skip the theory and get straight to the practical stuff — building REST APIs, mapping database relationships with JPA, handling authentication, and shipping your app with Docker. Written for developers who want working code, not just concepts.
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