Otavio Santana’s Post

If two responsibilities always change together, separating them may create more problems than it solves Read more 👉 https://lttr.ai/Aoe3X #SoftwareDesign #java #SOLIDPrinciples #SingleResponsibilityPrinciple

What’s your go-to approach for dynamic search in Spring Boot? 🤔 When it comes to JPA Specifications vs @Query most developers get this decision wrong. ❌ Here’s how to actually choose the right one 👇 #SpringBoot #Java #SoftwareEngineering

Did you know that List.of() and Set.of() create immutable collections in Java? What does that mean? You cannot add, remove, or modify elements after creation. Key Points: ❌ No modification allowed ❌ No null values allowed ✅ Safer (no accidental changes) ✅ Cleaner than Arrays.asList() When should you use it? - Constants - Read-only data - Defensive programming (protect your APIs) Common mistake: Treating it like a normal list → runtime exception #java #interview #immutable #certification

Master @RequestParam in Spring Boot to handle query parameters like a pro. Learn how to extract validate, and use reguest data effectively in your REST APIs. blog Link: https://lnkd.in/gAxZH4Hf #SpringBoot #Java #BackendDevelopment #RESTAPI #WebDevelopment #ayshriv

Java’s real breakthrough wasn’t syntax — it was portability. The Java Virtual Machine allowed organizations to rethink software distribution and deployment across diverse hardware and OS environments. A quick read for tech leaders and engineers: https://wix.to/GEDnmYF #Java #SoftwareArchitecture #TechLeadership #JVM

#Day95 of #100DaysOfCode Extended the previous number-to-words program to handle multiple digits. The program takes a number as input and prints each digit in its word form. Focused on improving logic by combining loops, string conversion, and conditional handling. #Java #MiniProject #100DaysOfCode

🚀 Most developers learn Java syntax... But very few learn how to write production-ready Java applications properly. That’s where Java Design Patterns make all the difference 👇 ☕ 5 Java Patterns Every Developer Should Know 1️⃣ Singleton Pattern ↳ Ensure only one instance exists 👉 Useful for configs, loggers, caches 2️⃣ Factory Pattern ↳ Create objects without exposing creation logic 👉 Cleaner & scalable code 3️⃣ Builder Pattern ↳ Build complex objects step by step 👉 Best for DTOs & request objects 4️⃣ Strategy Pattern ↳ Switch algorithms dynamically 👉 Cleaner business logic 5️⃣ Observer Pattern ↳ Notify multiple objects on state change 👉 Great for event-driven systems 💡 Here’s the truth: Great Java developers don’t just write classes... They use the right patterns at the right time. #Java #SpringBoot #BackendDevelopment #Programming #SoftwareEngineer #Coding #Developers #Tech #JavaDeveloper #SoftwareArchitecture

Ever wondered what happens after you write Java code? 🤔 👉 .java → .class → JVM → Execution That’s where JVM Architecture comes in! ⚙️ Class Loader 🧠 Memory Areas 🚀 Execution Engine ♻️ Garbage Collector All working together to run your code smoothly 💯 Drop a 🔥 if this helped you! #Java #JVMArchitecture #CodingJourney #ProgrammerLife #SoftwareEngineer #LearnProgramming #TechExplained #CodeDaily #Developers #JavaLearning

Understanding Java Class Loading & Memory Areas Today, I learned how Java manages memory during Class Loading. It helped me understand what happens behind the scenes when a program runs.  Simple Example: class Demo { static int x = 10; // Stored in Method/Class Area void show() { int y = 5; // Stored in Stack System.out.println(x + y); } } public class Main { public static void main(String[] args) { Demo obj = new Demo(); // Object stored in Heap obj.show(); } } **When this program runs: 1.Class is loaded into Method Area 2.Static variable (x) is initialized once 3.Object (obj) is created in Heap 4.Method execution happens in Stack #Java #Programming #LearningJourney #SDLC #Coding #Developer #CareerGrowth

Custom Exception – Make Your Code Smarter In Java, built-in exceptions don’t always capture real-world business logic. That’s where Custom Exceptions come into play. What is a Custom Exception? A user-defined exception created by extending Exception or RuntimeException to handle application-specific errors. Why use it? 1. Cleaner and meaningful error handling 2. Better readability & debugging 3. Separates business logic errors from system errors Quick Example: class InvalidAgeException extends Exception { public InvalidAgeException(String message) { super(message); } } class Test { static void validate(int age) throws InvalidAgeException { if (age < 18) throw new InvalidAgeException("Not eligible"); else System.out.println("Eligible"); } public static void main(String[] args) { try { validate(16); } catch (InvalidAgeException e) { System.out.println(e.getMessage()); } } } #Java #Programming #ExceptionHandling #Coding #Developers #SoftwareEngineering