All Categories - Blog of Vincent VAUBAN

🔸 QUIZ (CHOOSE ONE) ▪️ It defines the maximum number of consumer records processed per minute. ...
November 22, 2025 · java,interview,coding
📐 Problem Given a string containing only ()[]{}, determine if it’s well-formed: every opening...
November 22, 2025 · java,cleancode,programmmer
🔸 TL;DR Strings are a poor substitute for real types. If the data is a number, boolean, enum,...
November 22, 2025 · springboot,spring,slides,certification,vcp
🔸 WHY SPRING CERTIFICATION IS A GREAT ASSET TODAY ▪️ Validates real-world, production-ready...
November 22, 2025 · cleancode,programmmer
🔸 TL;DR ▪️ Delegation is good… until your class just forwards calls. ▪️ If half the methods...
November 22, 2025 · java,programmmer,intellij
🗣️“The art of being wise is the art of knowing what to overlook.” — William James 🔸 TL;DR ...
🔸 TL;DR The ApplicationContext is Spring’s container. It creates and wires beans, manages...
November 22, 2025 · java,certification,ocp,slides,java21
☕🎓 JAVA 21 OCP — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 eipsod7 🔸 WHY JAVA CERTIFICATION...
Java devs, if you had to learn one next language, where would you invest your time? 🔸 JVM...
🔸 TL;DR Use Swagger/OpenAPI annotations to turn your Spring REST APIs into living...
🔸 TL;DR ▪️ Keep a clear file header, then package, then import. ▪️ Split the file into...
November 10, 2025 · programmmer,techlead,workplace
It’s not about being famous. It’s about building trust. I’m not looking for attention. I...
November 10, 2025 · springboot,spring,java,github
🔸 TL;DR ▪️ I pushed a tiny Spring Boot endpoint that validates request bodies with networknt...
November 10, 2025 · java,cleancode,programmmer
TL;DR Prefer interface types in your APIs and variables for flexibility and testability. Use a...
November 10, 2025 · coding,interview,programmmer
Problem (aka LeetCode 226) Given the root of a binary tree, swap every node’s left and right...
November 10, 2025 · java,spring,springboot,slides,certification
🔸 WHY SPRING CERTIFICATION IS A GREAT ASSET TODAY ▪️ Validates real-world, production-ready...
🔸 TLDR ▪️ JWT = a token format (usually JSON + signature). ▪️ OAuth 2.0 = delegated...
🔸 TLDR Use 4 spaces per indent, keep lines ≤ 80 chars (≈ 70 in docs), and when you must wrap:...
🔸 TL;DR ▪️ Message chains leak internals and create fragile coupling. ▪️ Fix by hiding...
November 10, 2025 · java21,java,ocp,certification,slides
🔸 WHY JAVA CERTIFICATION IS A GREAT ASSET TODAY ▪️ Signals up-to-date skills (Java 21: virtual...
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