Day 1: java inroduction
What is Java?
Java is a popular, high-level, object-oriented programming language designed for flexibility, security, and cross-platform compatibility. It follows the "Write Once, Run Anywher...
DAY 2 -JAVA
WHAT IS A JOR FILE?A JAR file allows Java runtimes to efficiently deploy an entire application, including its classes and their associated resources, in a single request.WHAT IS CLASS?Class is an gro...
Hexagonal+optimistic may not be easy
Hexagonal or ports & adapters architecture is commonly used to structure the services so that details of the communication (including APIs and database access) do not leak into the business logic ...
Cap8 Mais operações com Streams
Ordenando um Stream1 Ordenação de uma List
Utiliza o método sort da List.Exemplo de ordenação por nome:
usuarios.sort(Comparator.comparing(Usuario::getNome));2 Ordenação em um Stream
O método ...
Dica Java: Métodos estáticos não! #003
Essa dica: é muito importante para quem faz testes unitários!Imagine uma service com 2 métodos que possuem a mesma validação (IF) como abaixo:
⛶@Service
@RequiredArgsConstructor
public class Pe...
Configurations? Forget about it!
The Ultimate Application Config tool:
A Realtime SDK and Web Admin Solution
What's the first task we're assigned to when we join any project?Setup our Development Environment (Yeah!....
Is Your Code the Hope Diamond? Entering the National Museum with SAST and Spring Boot!
🔐 Is Your AI-Powered Fintech App Secure Enough? 🔐
Imagine an AI-driven finance app that helps users track their spending. Sounds great, right? But what if a malicious user tries this prompt: "Li...
Is Your Code a Swiss Army Knife or a Master Blueprint? Unraveling the Mystery of Interfaces vs. Abstract Classes
Imagine setting out on an expedition in a dense, uncharted jungle. You pack a Swiss Army knife — versatile, adaptable, and ready for any small task — while also carrying a custom-built blueprint f...
Spring Certified Professional 2024 Certification Exam Tips
Introduction
The Spring Certified Professional 2024 certification, offered by VMware, is a recognized credential for developers who want to validate their expertise in the Spring Framework an...
Day-06: Hello-world from JAVA
To install Java in Linux machine:
sudo apt install default-jdk -yCode working flow:
Source Code to Byte Code - Compilation
Byte Code to Binary Code - Execution
Source Code to Byte Code - Compile Ti...