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JavaGuide

Backend tech guide and AI engineering practice covering fundamentals, databases, distributed systems, high concurrency, system design, plus AI agents and large-model engineering.

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Latest from JavaGuide

68 recent articles

JavaGuide

Oct 21, 2025 · Backend Development

Xiaohongshu’s Explosive Salaries and a Complete Backend Interview Guide

The article reveals Xiaohongshu’s unusually high 2023 campus recruitment packages—over 51 w annual total—while also providing an extensive backend interview preparation guide covering TCP vs UDP differences, design patterns, workflow versus rule engines, message‑queue selection, and Redis data structures and eviction policies.

Backend developmentDesign PatternsMessage Queue

0 likes · 32 min read

Xiaohongshu’s Explosive Salaries and a Complete Backend Interview Guide

JavaGuide

Oct 19, 2025 · Backend Development

Java Backend Guide: @Autowired vs @Resource, MySQL Engines, Redis, JVM OOM

The article shares ZTE salary offers and interview tips, then dives into technical deep‑dives on Spring bean injection annotations, compares MySQL InnoDB and MyISAM, explains Redis usage patterns, and walks through JVM OutOfMemoryError diagnosis with concrete code and tooling examples.

BackendJVMJava

0 likes · 21 min read

Java Backend Guide: @Autowired vs @Resource, MySQL Engines, Redis, JVM OOM

JavaGuide

Oct 17, 2025 · Artificial Intelligence

Alibaba Open‑Sources Spring AI Alibaba Admin: A Full‑Lifecycle AI Agent Platform

Spring AI Alibaba extends Spring AI with multi‑agent and enterprise features, but faces three engineering hurdles—inefficient prompt debugging, unguaranteed AI quality, and opaque operations—so Alibaba released Spring AI Alibaba Admin, offering prompt templating, dataset versioning, evaluator configuration, experiment management, and deep observability to streamline AI agent development and deployment.

AI AgentEvaluatorExperiment Management

0 likes · 8 min read

Alibaba Open‑Sources Spring AI Alibaba Admin: A Full‑Lifecycle AI Agent Platform

JavaGuide

Oct 16, 2025 · Backend Development

Why Upgrading from Java 8 to Java 21 Boosts Development Efficiency

The article walks through the evolution from Java 8 to Java 21, comparing preview and standard features such as pattern‑matching instanceof, switch expressions, text blocks, the new HttpClient API, var type inference, virtual threads, records, immutable collections, improved try‑with‑resources, sequenced collections, and garbage‑collector enhancements, illustrating each with concrete code examples and practical recommendations.

JavaJava 21Pattern Matching

0 likes · 16 min read

Why Upgrading from Java 8 to Java 21 Boosts Development Efficiency

JavaGuide

Oct 12, 2025 · Interview Experience

How to Tell If Your Project’s Tech Stack Is Reasonable (and Avoid Interview Disses)

The article explains why interviewers often reject flashy project tech stacks, shows how to evaluate the practicality of your own solutions, and lists common over‑engineered patterns such as unnecessary micro‑service suites, misuse of Redis, and needless sharding.

Message QueueRedisinterview

0 likes · 6 min read

How to Tell If Your Project’s Tech Stack Is Reasonable (and Avoid Interview Disses)

JavaGuide

Oct 8, 2025 · Databases

Is MySQL Now the Runner‑Up to PostgreSQL in the AI Era?

While MySQL has long dominated relational databases with its open‑source stability and massive user base, the rise of AI and PostgreSQL’s extensible ecosystem—highlighted by extensions like pgvector, pg_bm25, TimescaleDB and PostGIS—are shifting developer preference, as shown by the 2025 Stack Overflow survey.

AIDatabase ExtensibilityMySQL

0 likes · 6 min read

Is MySQL Now the Runner‑Up to PostgreSQL in the AI Era?

JavaGuide

Sep 28, 2025 · Artificial Intelligence

JD Open‑Sources JoyAgent‑JDGenie: A Product‑Grade Java Multi‑Agent AI Platform

JD Cloud has released JoyAgent‑JDGenie, the first fully product‑grade open‑source Java multi‑agent system that bundles front‑end, back‑end, framework, engine and core agents, supports major LLMs, offers layered architecture, Docker or manual deployment, and showcases demos such as PPT generation and sales analysis.

AIDockerJava

0 likes · 6 min read

JD Open‑Sources JoyAgent‑JDGenie: A Product‑Grade Java Multi‑Agent AI Platform

JavaGuide

Sep 27, 2025 · Cloud Computing

Alibaba Cloud OSS Browser 2.0: New UI and Features Compared to 1.0

The article reviews Alibaba Cloud's OSS Browser 2.0, highlighting its refreshed interface, three login options, batch and folder upload up to 10 GB, online preview/edit capabilities, and compares its stability and usability against the older 1.0 client that struggled on Windows Server.

Alibaba CloudCloud StorageGUI client

0 likes · 4 min read

Alibaba Cloud OSS Browser 2.0: New UI and Features Compared to 1.0