If you’re a Java developer who has been watching the AI wave and wondering “how do I plug my Spring Boot app into an LLM like Claude or ChatGPT?” — Model Context Protocol (MCP) is the answer you’ve been waiting for. In this guide, you’ll build a fully working MCP Server using Spring Boot 3 … Read more
The Singleton design pattern sounds simple — “one instance, one class.” But if an interviewer gives you five minutes and a whiteboard, the real depth reveals itself fast. Thread safety, memory model guarantees, reflection attacks, serialization loopholes, classloader edge cases, and how Spring quietly replaces the whole thing. This guide covers everything a senior Java … Read more
Series: GenAI with Java | Post 2 of 21 If you are a Java developer who wants to start building AI-powered applications using Google Gemini, you are in the right place. In this tutorial, we will set up the Google GenAI Java SDK, connect to the Gemini API, and make our first AI call — … Read more
If you are looking for a practical way to use Gemma 4 in Java, this project is a strong place to begin. It shows how to connect a Java application to a powerful generative AI model, keep conversation history, stream responses in real time, and build a modern chatbot experience—without heavy frameworks. This guide is … Read more
Java SE 26 (JDK 26) was released in March 2026 as a non-LTS feature update. Unlike major LTS releases, Java 26 focuses on improving performance, security, and developer productivity rather than introducing new stable language syntax. It includes around 10 JEPs (Java Enhancement Proposals), many of which are preview or incubator features. In simple terms, … Read more
In Java, grouping is a very common operation when working with collections. You often need to organize data into categories — for example: Before Java 8, this required manual loops, maps, and condition checks. With the introduction of Streams API and Collectors, Java provides a powerful and clean way to perform grouping using: Collectors.groupingBy() This … Read more
If you are preparing for a Java interview — whether for a junior, mid-level, or senior backend role — understanding how interviewers think is just as important as memorizing answers. Modern interviews focus on core Java fundamentals, real-world problem solving, performance, and system design skills. This article gives you a plagiarism-free, structured guide to the … Read more
Artificial Intelligence is no longer limited to Python ecosystems. With LangChain4j, Java developers can integrate modern LLMs cleanly and professionally. In this tutorial, we’ll build an interactive AI console using Google Gemini — specifically the fast and efficient Gemini 2.5 Flash model. By the end of this guide, you will have: What is LangChain4j? LangChain4j … Read more
Modern applications often need to perform multiple tasks simultaneously—processing user requests, calling external APIs, handling database operations, or running background jobs. Java provides powerful concurrency tools, and one of the most important among them is the ExecutorService framework. Instead of manually creating and managing threads, ExecutorService simplifies thread management, improves performance, and helps developers build … Read more
Modern software systems must execute multiple operations concurrently, such as serving user requests, processing data, invoking APIs, and performing database updates. Threads in Java enable this concurrency model by allowing multiple execution paths within a single process, preventing the performance bottlenecks of purely sequential execution. This is where threads in Java become essential. For higher-level … Read more