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.
IntelliJ IDEA 2026.1 EAP 3 finally adds a recycle‑bin‑style file deletion, alongside dozens of enhancements for Spring, Java, Kotlin, editor experience, AI‑assisted completion, platform architecture, and performance, addressing long‑standing developer complaints and preparing the IDE for remote and AI‑driven workflows.
This article introduces the open‑source ERPNext system, outlines its key features, and provides step‑by‑step Docker commands for self‑hosting, enabling businesses to deploy a full‑featured, customizable ERP solution quickly and cost‑effectively.
Spring Boot 4 restructures the framework into independent auto‑configuration modules, reducing package bloat, speeding up startup, lowering memory usage, and providing more precise and flexible configuration options for developers migrating from earlier versions.
The article explores the common dilemma of choosing between Long and BigDecimal for monetary values, summarizing ten distinct community suggestions ranging from using Long, BigDecimal, String, Protobuf, custom types, leadership advice, AI assistance, to minimalist integer approaches.
This article explains the motivation behind Java generics, their benefits such as compile‑time type checking and reduced casting, and provides concrete examples including generic classes, interfaces, collections, inheritance, custom generic methods, and common pitfalls, illustrated with code snippets and diagrams.
The article examines a production OutOfMemoryError caused by MyBatis SQL construction, explains heap and metaspace exhaustion, analyzes MyBatis source code, reproduces the issue with JVM settings, and offers practical recommendations to prevent similar memory failures.
This article walks through converting a SpringBoot Maven project (mall‑tiny) to Gradle, explains Gradle’s key features and plugins, shows step‑by‑step setup, demonstrates dependency migration, compares build times with Maven, and provides a complete Gradle build script with reference links.
A performance comparison of SpringBoot 4.0 with virtual threads shows Tomcat achieving up to fifteen times higher QPS than Jetty, while startup times remain similar, and provides step‑by‑step instructions for building native Docker images and switching containers.
This article compares PostgreSQL and MySQL, highlighting PostgreSQL's richer data types, native sequences, extensible ecosystem, advanced monitoring, robust replication, open licensing, and MVCC implementation, while also acknowledging MySQL's strengths in simplicity and read‑heavy web workloads.
Maven 4 introduces a revamped POM model, native flattening, explicit artifact types, subproject support, a tree‑based lifecycle for parallel builds, and richer configuration options, making it a timely upgrade for modern Java development pipelines.
