Real World Java – Medium

Real World Java

Real World Java

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Jul 3

LangChain4j vs Spring AI : Architecture, Setup, and Building Your First AI Application

Now that we understand the philosophy behind both frameworks, let’s move beyond the theory.

LangChain4j vs Spring AI : Architecture, Setup, and Building Your First AI Application

Real World Java

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Jul 3

LangChain4j vs Spring AI: Which One Should Java Developers Choose in 2026?

Introduction

LangChain4j vs Spring AI: Which One Should Java Developers Choose in 2026?

Real World Java

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Jun 20

🤖 Building an AI Agent with Spring Boot and Gemini API

Everyone is talking about AI agents. But as a Java developer, one question kept bothering me:

🤖 Building an AI Agent with Spring Boot and Gemini API

Real World Java

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Jun 18

What Happens When Multiple Users Hit Your API at the Same Time?

If 1,000 users click the “Buy Now” button simultaneously, does Spring Boot create 1,000 copies of your application? Or does one server…

What Happens When Multiple Users Hit Your API at the Same Time?

Real World Java

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Jun 14

You Built a Spring Boot API… But Do You Know What Happens When a Request Hits Your Server?

Most Java developers can build a Spring Boot REST API in minutes.

You Built a Spring Boot API… But Do You Know What Happens When a Request Hits Your Server?

Real World Java

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Jun 8

Why Most Java Developers Fail System Design Interviews (And How to Fix It)

You’ve built REST APIs. You know Spring Boot. You’ve deployed microservices. So why do system design interviews still feel impossible?

Why Most Java Developers Fail System Design Interviews (And How to Fix It)

Real World Java

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Jun 3

From CRUD APIs to System Design: The Journey Every Java Developer Must Take

Most Java developers start their careers building CRUD APIs.

From CRUD APIs to System Design: The Journey Every Java Developer Must Take

Real World Java

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May 27

How Spring Dependency Injection Really Works Internally

Most Java developers use Spring Dependency Injection every single day.

How Spring Dependency Injection Really Works Internally

Real World Java

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May 16

We Built an AI Agent in Spring Boot — Here’s Everything That Broke in Production

Everyone is building AI agents in 2026.

We Built an AI Agent in Spring Boot — Here’s Everything That Broke in Production

Real World Java

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May 9

AI Agents Explained: The Complete Practical Guide to Building Intelligent Systems in 2026

If you’ve been paying attention to AI in 2026, you’ve probably noticed one word everywhere:

AI Agents Explained: The Complete Practical Guide to Building Intelligent Systems in 2026

Real World Java

Real World Java

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