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Originally published at tomazfernandes.dev. You write a method, add @SqsListener, and messages start arriving. It is easy to see that as a simple ann
Before anything, this is the import you need: import java.util.ArrayList; And this is how you create one: ArrayListString> list = new Arra
👋 Hello Developers, The market is shifting. We are seeing a surge in JAVA roles this week. My bot just scanned 200+ verified remote jobs,
Two Years with Papers: How I Built My Real "Second Brain" Honestly, I never thought I'd be the kind of person who talks about "second brain
Turn-based multiplayer is deceptively hard. Here's how I designed a simple, fast, and cost-effective relay backend that auto reconnects dropped client
If you've built an LLM feature in Spring Boot, you've probably done something like this: created a @Bean with @Tool-annotated methods, wired it into y
What if I told you that even if you hash passwords, an attacker might still crack them in seconds? Authentication is one of the most critical parts o
**Le Scénario Classique Le Développeur : "J’ai bien fait tous mes save(), tout est en base de** données, je peux partir en pause." Spring F
When working with inheritance in Java, you’ll often hear two terms: Upcasting and Downcasting. Don’t worry — it’s not as complicated as it sounds. F
What is an Exception? An unwanted or unexpected event that interrupts or disturbs the normal flow of the program is called an Exception. Example: E
LLM agents are becoming operational interfaces. This is part 2 of our ongoing series on safely integrating LLMs with production backends. B
1.Adding Elements ArrayListString> list = new ArrayList<>(); list.add("Apple"); System.out.println(list); --> output:[Apple] 2.Accessing Elem
Most software doesn't have a domain model. It has a database schema, a set of service classes that orchestrate calls to it, and a collection of user s
Have you ever encountered an algorithm problem where you need to find pairs of numbers that are "mirrors" (reversals) of each other? Recently, I was
No tests. No confidence. Every push was a risk. That was the reality of our Internet Banking frontend project. I was working on the Back-Office Clien
How I Built a Fully Automated Asian Tech News Newsletter with Spring Boot + Gemini AI From RSS ingestion to your inbox — zero manual work.
Before you jump into advanced Data Structures like stacks, queues, or hash tables, there’s one concept you must fully understand Arrays. If arrays a
Your service runs fine at 2 PM. At 6 PM, the database experiences a brief latency spike—nothing catastrophic, maybe 200ms slower than usual. Within m
Java 26 Project Amber Latest Updates and Features Explore the latest updates and features of Java 26 Project Amber, including enhanced syn
Strong fundamentals don’t just improve code—they shape how systems are built. Working deeply with Core Java sharpened my approach to problem-solving,