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Learn the Factory Method Design Pattern in Java — what problem it solves, how it works, practical Java examples, benefits, drawbacks, and how modern frameworks like Spring internally use factory-based…
Learn the Singleton Design Pattern in Java — what problem it solves, how it works, different implementation approaches, thread safety concerns, common pitfalls, and where Singleton is actually useful in…
Learn the three major categories of Gang of Four (GoF) Design Patterns — Creational, Structural, and Behavioral. Understand what problems each category solves with practical Java examples and real-world framework…
Learn what Gang of Four (GoF) Design Patterns are, why software design patterns are needed, common engineering problems they solve, and an overview of all 23 GoF patterns with practical…
Learn Big O notation and algorithmic complexity in Java with practical examples. Understand O(1), O(n), O(log n), O(n²) using simple loops, HashMap, ArrayList operations, searching algorithms, and real programming scenarios.…
What really happens when 10,000 users hit your Spring Boot API simultaneously? Does Spring Boot create 10,000 threads? Does Tomcat queue requests? And can Java Virtual Threads genuinely change backend…
