Programming Tutorials

Day 9/90: Methods 90 Day Java Challenge: Zero to Production Today I wanted methods to feel like a real engineering decision, not a syntax

Mutable Key Problem in HashMap HashMap depends on hashCode() remaining stable If the key changes after insertion: hashCode changes bucket location c

The Problem: The "SaaS Tax" on Small Portfolios As I began scaling my portfolio, I hit a wall: the cost of licensing servers. Most security solutions

About build tools Gradle and Maven are two popular build tools. Build tools are software that automates the project build process. Such

Editing documents programmatically can be a complex task, especially when dealing with various file formats like DOCX, PDF, and HTML. Developers often

Difficulty: Easy Topics: Array, Sorting Platform: Leetcode Problem Statement Given an integer array nums, return the third distinct maxi

Java 17 Migration Guide from Java 8 Step by Step Migrate your Java application from Java 8 to Java 8 to Java 17 with this comprehensive st

Introduction Master in Java with Springboot is a practical certification path for developers and engineering professionals who want to bu

Introduction Master in Java with Springboot is a practical certification path for developers and engineering professionals who want to bu

Introduction Master in Java with Springboot is a career-focused learning and certification path for professionals who want to build stron

Introduction Master in Java with Springboot is a practical certification path for developers, DevOps engineers, beginners, and engineerin

Introduction Master in Java with Springboot is a practical certification path for developers, DevOps engineers, beginners, and engineerin

Modern APIs are trending more and more away from monolith architecture towards smaller, independent services.  Serverless applications are currently

Java 17 Text Blocks and Multiline Strings Tutorial (2026) Java 17 text blocks and multiline strings tutorial. Learn how to use text blocks

POJO in Java – What and Why? In Java, POJO stands for Plain Old Java Object. A POJO is a simple Java class that is not dependent on any sp

A POJO (Plain Old Java Object) is a simple Java class that is not tied to any special frameworks or restrictions. It is mainly used to represent data.

Encapsulation in Java is the process of wrapping data (variables) and the code that acts on that data (methods) together as a single unit, typically

Mastering Java 21 String Templates: A Comprehensive Tutorial Learn Java 21 string templates with practical examples and expert guidance in

MCP Client with LangChain4j: Connecting an Agent to Multiple Services In the previous post, I turned each microservice into an MCP server.

Vectorizing Real-Time Kafka Events for RAG In the previous post, I set up pgvector and Ollama for embedding and vector search. Now I need t