HashMap Internals in Java - How It Works Under the Hood
A beginner-friendly guide to how Java HashMap works internally: hashing, buckets, collisions, resizing, and why good keys matter.
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SOLID Principles in Java – Write Code That Doesn't Come Back to Haunt You
A practical, example-driven guide to the five SOLID principles in Java — what they mean, why they matter, and how to actually apply them.
Java Streams API – Complete Guide with Practical Examples
Master Java Streams with all essential operations including filter, map, flatMap, reduce, matching, and parallel streams.
Java Architecture – How It Actually Works Under the Hood
A deep dive into Java's architecture — from source code to execution — covering JDK, JRE, JVM, classloading, memory model, and the JIT compiler.
LeetCode #1 - Merge Sorted Array
Important Question #1 on LeetCode: Merge Sorted Array
Getting Started with Spring Boot’s WebClient
An introduction to using Spring Boot’s WebClient—the modern, reactive replacement for RestTemplate.
Discovering the Magic of the Abacus
A fun dive into the abacus — its history, basics, and how to use it.