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Java Companion

Apr 24, 2026 · Artificial Intelligence

Which of the 9 IDEA AI Plugins Is Your Ideal Coding Partner?

This article compares nine popular AI coding assistants for IntelliJ IDEA—GitHub Copilot, Lingma, Comate, Codeium, Tabnine, Amazon Q Developer, CodeGeeX, Supermaven, and JetBrains AI—detailing their core features, pricing, strengths, weaknesses, and offering scenario‑based recommendations to help developers choose the best fit.

AI coding assistantIntelliJ IDEAJava development

0 likes · 15 min read

Which of the 9 IDEA AI Plugins Is Your Ideal Coding Partner?

Java Companion

Apr 18, 2026 · Backend Development

How Arthas + MCP Enable AI-Powered Java Runtime Diagnosis

The article explains how the open‑source Java diagnostic tool Arthas now supports the Model Context Protocol (MCP), allowing AI assistants to invoke Arthas commands directly for CPU, latency, version, and Spring Bean issues, while covering installation, usage scenarios, and production safeguards.

AIArthasBackend Tools

0 likes · 13 min read

How Arthas + MCP Enable AI-Powered Java Runtime Diagnosis

Java Companion

Apr 17, 2026 · Backend Development

Resolving ID Conflicts After Sharding: 5 Practical Solutions

When sharding databases, independent auto‑increment IDs can collide; this article explains why the conflict occurs and evaluates five concrete solutions—UUID, MySQL auto‑increment step, segment allocation, Snowflake algorithm, and Meituan Leaf—detailing their mechanisms, trade‑offs, performance, and suitability.

Meituan LeafMySQLSnowflake

0 likes · 14 min read

Resolving ID Conflicts After Sharding: 5 Practical Solutions

Java Companion

Apr 16, 2026 · Databases

Is Running MySQL in Docker Really a Bad Idea?

This article dissects the common claim that MySQL should not be run in Docker by explaining the underlying design mismatch, measuring I/O overhead, examining persistence and resource‑isolation pitfalls, reviewing replication challenges, and presenting real‑world cases from JD and Tongcheng to show when containerization is safe and when it isn’t.

DockerMySQLProduction

0 likes · 12 min read

Is Running MySQL in Docker Really a Bad Idea?

Java Companion

Apr 14, 2026 · Information Security

Why Interviewers Mock Storing Tokens in Redis—and How to Answer Correctly

The article explains JWT fundamentals, why pure stateless tokens cannot be revoked, compares blacklist and whitelist Redis strategies, discusses token renewal with double‑token design, and shows how to articulate the right answer in an interview.

JWTRedisRefresh Token

0 likes · 13 min read

Why Interviewers Mock Storing Tokens in Redis—and How to Answer Correctly

Java Companion

Apr 12, 2026 · Backend Development

Automatically Turn Java Methods into Mermaid Flowcharts with Java2Flowchart

Java2Flowchart is an IntelliJ IDEA plugin that analyzes a Java method’s control flow—including branches, loops, exception handling, and call chains—and generates a clear Mermaid diagram, helping developers quickly understand, debug, and document complex code.

FlowchartIntelliJJava

0 likes · 10 min read

Automatically Turn Java Methods into Mermaid Flowcharts with Java2Flowchart

Java Companion

Apr 11, 2026 · Artificial Intelligence

Seamless AI Coding in IntelliJ: Integrating Claude Code with IDEA

This guide walks through installing Claude Code CLI, then compares the official JetBrains Beta plugin and the community‑built Claude Code Plus plugin for IntelliJ IDEA, detailing setup steps, core features like diff view, context sync, model switching, and offers advice on which solution fits different workflows.

AI coding assistantCLIClaude Code

0 likes · 9 min read

Seamless AI Coding in IntelliJ: Integrating Claude Code with IDEA

Java Companion

Apr 10, 2026 · Backend Development

Stop Confusing PO, VO, BO, DTO, DAO, and POJO: A Complete Guide

This article explains the six common Java object types—POJO, PO, DAO, BO, DTO, and VO—detailing their roles in a three‑layer architecture, how they flow through a request, conversion tools, a comparison table, and answers common questions for developers.

ArchitectureBOBackend

0 likes · 16 min read

Stop Confusing PO, VO, BO, DTO, DAO, and POJO: A Complete Guide

Java Companion

Apr 9, 2026 · Backend Development

Finally Open‑Source: Rebased Extracts IntelliJ IDEA’s Git UI into a Standalone Client

Rebased is a community‑driven, open‑source Git client that reproduces IntelliJ IDEA’s full‑featured Git UI—including three‑pane diff, interactive rebase, and GitHub integration—while offering cross‑platform installers, source‑build instructions, a feature comparison with other clients, and a clear outline of its current limitations.

GitIntelliJ IDEARebased

0 likes · 12 min read

Finally Open‑Source: Rebased Extracts IntelliJ IDEA’s Git UI into a Standalone Client

Java Companion

Apr 7, 2026 · Backend Development

A Lighter‑Than‑MQ Asynchronous Solution: Spring’s Hidden Event‑Driven Feature

The article explains how Spring’s built‑in ApplicationEvent and @EventListener mechanism provides a lightweight, zero‑dependency alternative to external message queues for decoupling logic within the same JVM, covering core components, implementation styles, async execution, transactional listeners, pitfalls, performance comparison, and production best practices.

SpringSpring Bootapplicationevent

0 likes · 23 min read

A Lighter‑Than‑MQ Asynchronous Solution: Spring’s Hidden Event‑Driven Feature