HashMap and HashSet Frequency Pattern in Java — A Detailed Guide
Hash-based patterns are the default when you need fast membership checks, counts, or complement lookups. This pattern often converts nested-loop logic into l...
Technical Blog
Recent posts
Prefix Sum Pattern in Java — A Detailed Guide for Serious Engineers
Prefix Sum is one of the highest-leverage DSA patterns. It converts repeated range computations from repeated work into constant-time lookups after linear pr...
Sliding Window Technique in Java — A Detailed Guide for Serious Engineers
Sliding Window is a focused form of the Two Pointers technique. If Two Pointers teaches movement strategy, Sliding Window teaches stateful range management.
Java 25 New Features — Complete Guide with Examples
Java 25 is an LTS release (GA on September 16, 2025). This article covers all JDK 25 release JEPs with practical examples.
Java 21 New Features — Complete Guide with Examples
Java 21 is an LTS release with major improvements in concurrency, pattern matching, and collections. This article covers all JDK 21 release JEPs with examples.