Programming Tutorials

1. What is Static in Java? - A static variable or method belongs to the class, not to objects. This means only one copy exists and all objects s

For developers building quantitative trading systems, financial data analytics platforms, or market dashboards, the core requirement is never just "ge

I would like to introduce the PetStore sample application, which demonstrates a pure "Java-first" approach to web interface development. The entire pr

做量化交易、金融数据分析、行情看板开发的开发者，核心诉求从来不是“拿到数据”，而是“稳定拿到数据、可灵活查询数据、可复用数据”。 很多人初期调用金融数据API时，只会直接获取原始数据用于临时分析，一旦数据量增多、需求迭代，就会陷入“重复调用API、数据混乱、查询低效”的困境。正确的落地逻辑应该是：

1. Introduction Garbage Collection in Java is an automatic memory management process that removes unused objects from memory. The JVM provi

Since version 6.4.0, pac4j supports the OpenID (Connect) Federation specification. The OpenID Connect (in short, OIDC) support in pac4j (pac4j-oidc m

1. Introduction The intern method in Java is used to manage memory efficiently by storing string objects in a special memory area called th

When you begin learning Java, one concept becomes the foundation of everything you build: 👉 Classes and Objects At first, they may seem theoretical.

JADEx Spring Boot Example This example introduces the core features of JADEx (Java Advanced Development Extension) through a Spring Boot Us

Summary Default to Oracle APEX for Oracle-Database-centric Oracle Forms portfolios (data entry-heavy SQL & PL/SQL, quick ROI), and reserve

For months, my coding routine looked like this: Learn → Lose consistency → Stop → Restart again. So today I decided to restart properly — and docume

Introdução Estamos vivendo uma onda no desenvolvimento de software impulsionada pelo uso de IA generativa e, mais recentemente, por agentes

Using AI Agents to Debug Distributed Systems Faster At my company, we have a feature that allows customers to export large volumes of data

Hello everyone! In my last post, we saw how our Python service collects B3 data and publishes it to Kafka. Today, we take a crucial step: consuming t

In 2006, I worked on a large logistics system for transporting wood for pulp production. One of the most critical modules managed the entry and exit o

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Datatypes in java Java is a statically-typed language, meaning every variable must be declared with a data type before use. These types ar

Sum of Digits java public class Main { public static void main(String[] args) { int num = 1234, sum = 0; while (num > 0) {

in Java, primitive data types are the most basic types of data. They store simple values (not objects) and are very fast. 1. byte Size: 1

What is an Exception? An exception is an unwanted event that occurs during program execution. Example: Dividing a number by zero