Blog of Vincent VAUBAN

🛠️🧠 REFACTORING: CLEANER CODE WITHOUT CHANGING BEHAVIOR

December 29, 2025 · cleancode,craftsmanship,programmmer,techlead

🔸 TLDR ▪️ Refactoring = improving code structure without changing what it does ✅ ▪️ Do it in...

🪄🧠 JAVA “MAGIC” TYPES: THE ONES YOU CAN’T NAME

December 29, 2025 · java,programmmer,techlead

Java’s type system has a few “ghost” types: the compiler uses them, you benefit from them… but...

🍃🎓 SPRING CERTIFICATION — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod13

December 29, 2025 · springboot,spring,certification,vcp,slides

🔸 WHY SPRING CERTIFICATION IS A GREAT ASSET TODAY ▪️ Validates real-world, production-ready...

🧩🌐 JAKARTA FACES (JSF): SERVER-SIDE UI FOR JAVA WEB APPS

December 29, 2025 · jakartaee,programmmer

🔸 TLDR JSF/Jakarta Faces is a component-based, server-side UI framework for Java web apps,...

🧠💾 REACT: A PRACTICAL useLocalStorage HOOK

December 29, 2025 · react,programmmer

🔸 TLDR ▪️ A useLocalStorage hook keeps your React state persistent by reading from localStorage...

🔎🧵 DISTRIBUTED TRACING: FOLLOW A REQUEST ACROSS MICROSERVICES (WITHOUT GUESSING)

December 29, 2025 · api,programmmer,techlead

🔸 TL;DR Distributed tracing lets you see a single request hop through multiple services using...

☕🎓 JAVA 21 OCP — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod13

December 29, 2025 · java,java21,ocp,certification,slides

🔸 WHY JAVA CERTIFICATION IS A GREAT ASSET TODAY ▪️ Signals up-to-date skills (Java 21: virtual...

🧩🧹 SPLIT OVERLOADED CLASSES INTO SPECIFIC ONES (WITHOUT OVER-ENGINEERING)

December 29, 2025 · cleancode,programmmer,techlead,craftsmanship

That Clean Code recommendation — “Split overloaded classes into specific ones.” — is basically a...

📊POLL: Spring Boot 4: What’s your favorite feature? MODULES/ JSPECIFY/ API_VERSION/ OTEL

December 29, 2025 · poll,springboot

Spring Boot 4 is shaping up to be a big “make it easier to do the right thing” release....

📦🌐 WAR FILES: WHAT’S TRUE (AND WHAT’S A MYTH)?

December 29, 2025 · jakartaee,java,certification,programmmer

🔸 TL;DR A .war is basically a JAR-shaped archive for web apps. web.xml is optional (but has a...

🧹🚩 REMOVE FLAG ARGUMENT REFACTORING (MAKE YOUR METHODS SAY WHAT THEY DO)

December 29, 2025 · cleancode,craftsmanship,programmmer,techlead

🔸 ✅ TL;DR Flag arguments (boolean/enum/string) make methods do multiple jobs. Split them into...

⚛️⏱️ REACT DEBOUNCE HOOK – CLEANER SEARCH & FEWER API CALLS

December 29, 2025 · react

🔸 TLDR ▪️ Wrap your fast-changing value in a useDebounce hook ▪️ It only updates after the...

🧩🗄️ SPRING JDBCTEMPLATE: JDBC WITHOUT THE PAIN

December 29, 2025 · springboot,spring,programmmer,java,techlead

🔸 TL;DR ⚡ JdbcTemplate is your “SQL with Spring superpowers”: it removes JDBC boilerplate,...

🍃🎓 SPRING CERTIFICATION — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod12

December 29, 2025 · springboot,spring,certification,slides,vcp

🔸 WHY SPRING CERTIFICATION IS A GREAT ASSET TODAY ▪️ Validates real-world, production-ready...

🪵🔎 CHOOSING THE RIGHT LOG LEVEL (SO YOUR LOGS STAY USEFUL)

December 29, 2025 · api,programmmer,techlead

🔸 TL;DR Log levels are a contract: TRACE/DEBUG for developers, INFO for business flow, WARN...

🧰🔍 JDK BIN TOOLS YOU FORGOT YOU HAD (AND THE ONES ADDED/EVOLVED AFTER 2020)

December 29, 2025 · java,programmmer,techlead

🔸 TL;DR The JDK ships a seriously underrated toolbox in JAVA_HOME/bin: process discovery (jps)...

🧬🧩 SUBCLASS, ABSTRACT CLASS, OR INTERFACE? (JAVA CHOICES THAT SCALE)

December 29, 2025 · java,programmmer,techlead

🔸 TL;DR ▪️ Subclass when you truly need to extend an existing class (or you’re forced to). ...

☕🎓 JAVA 21 OCP — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod12

December 29, 2025 · java,certification,java21,slides,ocp

🔸 WHY JAVA CERTIFICATION IS A GREAT ASSET TODAY ▪️ Signals up-to-date skills (Java 21: virtual...

🧭🤝 BE THE DEV YOU’D LOVE TO WORK WITH

December 29, 2025 · quote,team,programmmer,techlead

“Be the developer you always wanted to have on your team.” — Vlad Mihalcea, Java Champion 🔸...

📊POLL: When will you migrate to Spring Boot 4? DONE/ IN_PROGRESS/ ASAP/ DEPENDS

December 29, 2025 · poll,springboot,spring

Spring Boot 4 migration isn’t just “bump the version” — it’s dependencies, plugins, baseline...

All Categories - Blog of Vincent VAUBAN

🛠️🧠 REFACTORING: CLEANER CODE WITHOUT CHANGING BEHAVIOR

🪄🧠 JAVA “MAGIC” TYPES: THE ONES YOU CAN’T NAME

🍃🎓 SPRING CERTIFICATION — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod13

🧩🌐 JAKARTA FACES (JSF): SERVER-SIDE UI FOR JAVA WEB APPS

🧠💾 REACT: A PRACTICAL useLocalStorage HOOK

🔎🧵 DISTRIBUTED TRACING: FOLLOW A REQUEST ACROSS MICROSERVICES (WITHOUT GUESSING)

☕🎓 JAVA 21 OCP — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod13

🧩🧹 SPLIT OVERLOADED CLASSES INTO SPECIFIC ONES (WITHOUT OVER-ENGINEERING)

📊POLL: Spring Boot 4: What’s your favorite feature? MODULES/ JSPECIFY/ API_VERSION/ OTEL

📦🌐 WAR FILES: WHAT’S TRUE (AND WHAT’S A MYTH)?

🧹🚩 REMOVE FLAG ARGUMENT REFACTORING (MAKE YOUR METHODS SAY WHAT THEY DO)

⚛️⏱️ REACT DEBOUNCE HOOK – CLEANER SEARCH & FEWER API CALLS

🧩🗄️ SPRING JDBCTEMPLATE: JDBC WITHOUT THE PAIN

🍃🎓 SPRING CERTIFICATION — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod12

🪵🔎 CHOOSING THE RIGHT LOG LEVEL (SO YOUR LOGS STAY USEFUL)

🧰🔍 JDK BIN TOOLS YOU FORGOT YOU HAD (AND THE ONES ADDED/EVOLVED AFTER 2020)

🧬🧩 SUBCLASS, ABSTRACT CLASS, OR INTERFACE? (JAVA CHOICES THAT SCALE)

☕🎓 JAVA 21 OCP — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod12

🧭🤝 BE THE DEV YOU’D LOVE TO WORK WITH

📊POLL: When will you migrate to Spring Boot 4? DONE/ IN_PROGRESS/ ASAP/ DEPENDS

☕🍃🔍

🛠️🧠 REFACTORING: CLEANER CODE WITHOUT CHANGING BEHAVIOR

🪄🧠 JAVA “MAGIC” TYPES: THE ONES YOU CAN’T NAME

🍃🎓 SPRING CERTIFICATION — TEST YOURSELF (3 QUESTIONS IN THE CAROUSEL) 🚀 episod13