Dedicated to Java tech sharing and dissecting top open-source projects. Topics include Spring Boot, Spring Cloud, Docker, Kubernetes and more. Author’s GitHub project “mall” has 50K+ stars.
When a production pod suddenly hit 90% CPU and dozens of young and full GCs within two hours, the author walks through a step‑by‑step investigation using top, thread‑level monitoring, jstack, and stack analysis to pinpoint a Java‑level memory issue and resolve it.
This article provides a comprehensive guide to Java concurrency and related concepts, covering synchronized lock upgrades, object vs class locks, lazy and double‑checked singleton implementations, ThreadLocal mechanics, reflection usage, annotation scopes, JVM class loading, and Redis cluster threading behavior.
This guide walks through creating a reusable Spring Boot starter that abstracts object storage services (OSS) via the Amazon S3 API, covering project setup, Maven dependencies, configuration properties, template interfaces, implementation, auto‑configuration, packaging, and a simple test case.
The article explains how treating the literal string "null" as an empty value in user registration can cause subtle backend errors, illustrates the issue with Java code examples, and offers proper validation techniques to avoid such pitfalls.
The article compiles several highly up‑voted Zhihu answers explaining why only a small fraction of programmers become software architects, highlighting differences in mindset, the limited need for architects in small teams, career trade‑offs, and the practical challenges of gaining high‑scale architecture experience.
Through a series of humorous dialogues, this article explains why developers need product managers to translate vague client demands into clear technical requirements, highlighting communication gaps, role separation, and the importance of a dedicated translator in software projects.
This article explains how placing a try‑catch block inside or outside a Java for loop affects exception handling, loop termination, and performance, providing code examples, execution results, memory analysis, and practical guidance for choosing the appropriate approach based on business needs.
WinBoat is an open‑source Electron‑based tool that lets Linux users run Windows applications as native windows by leveraging Docker containers, FreeRDP, and RemoteApp, offering seamless integration, automatic deployment, full compatibility, file‑system sharing, and flexible desktop modes, with detailed installation steps for both binary and source builds.
Cordys CRM is an open‑source, AI‑enhanced customer relationship management platform built with Spring Boot, Vue.js, Docker, and integrated tools like DataEase, SQLBot, and MaxKB, offering flexible UI, secure private deployment, powerful data visualization, and intelligent agents, with step‑by‑step Docker installation and usage guides.
This article examines the drawbacks of using Lombok in Java projects, demonstrates how replacing Lombok annotations with Java Records, explicit constructors, and MapStruct improves code readability, IDE support, and runtime safety, and shares the measurable benefits of the migration.
