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Java Architect Handbook
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Java Architect Handbook

Focused on Java interview questions and practical article sharing, covering algorithms, databases, Spring Boot, microservices, high concurrency, JVM, Docker containers, and ELK-related knowledge. Looking forward to progressing together with you.

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Recent Articles

Latest from Java Architect Handbook

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Java Architect Handbook
Java Architect Handbook
Apr 23, 2026 · Interview Experience

Meituan Second Interview: Solving High RocketMQ Consumption Latency in Production

During a Meituan second-round interview, the candidate explains how to diagnose and resolve high RocketMQ consumption latency in production, outlining a three‑step approach—stop the bleeding, recover service, and cure the root cause—through consumer scaling, message forwarding, logic optimization, concurrency tuning, queue expansion, and monitoring.

Consumer LagJavaMessage Queue
0 likes · 14 min read
Meituan Second Interview: Solving High RocketMQ Consumption Latency in Production
Java Architect Handbook
Java Architect Handbook
Apr 22, 2026 · Backend Development

How Changing Five Lines of Code Boosted API Throughput Over 10×

A low‑traffic B2B service struggled to meet a 500 req/s demand, achieving only 50 req/s with high CPU usage; through systematic profiling, lock analysis, async refactoring, thread‑pool tuning, and eliminating costly Spring bean creation, the team dramatically improved response times and throughput, revealing deeper CPU‑usage mysteries.

JavaPerformance optimizationSpring
0 likes · 16 min read
How Changing Five Lines of Code Boosted API Throughput Over 10×
Java Architect Handbook
Java Architect Handbook
Apr 21, 2026 · Information Security

How to Secure Spring Boot APIs with RSA Encryption: A Step‑by‑Step Guide

This article explains RSA encryption fundamentals, illustrates two practical scenarios, and walks through creating a Spring Boot project, adding Maven dependencies, configuring RSA keys, annotating controllers for automatic encryption/decryption, testing the endpoints, and handling client‑side encryption with JavaScript, while highlighting common pitfalls.

API SecurityJavaRSA
0 likes · 13 min read
How to Secure Spring Boot APIs with RSA Encryption: A Step‑by‑Step Guide
Java Architect Handbook
Java Architect Handbook
Apr 20, 2026 · Backend Development

Concurrency vs Parallelism in Java: Definitions, CPU Mechanics, and Interview Tips

The article explains how concurrency differs from parallelism by defining logical versus physical simultaneity, illustrates the concepts with everyday analogies and CPU scheduling details, provides Java code examples, lists common interview follow‑up questions, and offers a concise mnemonic for remembering the distinction.

Backend DevelopmentCPUJava
0 likes · 10 min read
Concurrency vs Parallelism in Java: Definitions, CPU Mechanics, and Interview Tips
Java Architect Handbook
Java Architect Handbook
Apr 18, 2026 · Databases

Redis Persistence Deep Dive: RDB, AOF, and Hybrid Strategies for Interview Success

This article provides a comprehensive analysis of Redis persistence mechanisms—including RDB snapshots, AOF append‑only logs, and the hybrid RDB+AOF mode—covering their architectures, trigger methods, performance trade‑offs, rewrite processes, interview‑focused questions, and practical recommendations for production environments.

Persistenceaofdatabase
0 likes · 11 min read
Redis Persistence Deep Dive: RDB, AOF, and Hybrid Strategies for Interview Success
Java Architect Handbook
Java Architect Handbook
Apr 16, 2026 · Industry Insights

Can Linux Replace Windows? A Developer’s Real‑World Evaluation

This article examines whether Linux can serve as a practical daily‑use operating system, covering its graphical interface, development tool support, communication apps, Windows‑replacement capabilities, Android app execution via xDroid, and the core advantages of elegance, efficiency, and freedom, illustrated with screenshots and personal software lists.

Desktop EnvironmentLinuxOperating System
0 likes · 12 min read
Can Linux Replace Windows? A Developer’s Real‑World Evaluation
Java Architect Handbook
Java Architect Handbook
Apr 14, 2026 · Backend Development

Why RocketMQ Beats Kafka and RabbitMQ in Java Interviews: 6 Core Advantages

This article breaks down the interview focus points for messaging middleware, explains RocketMQ's "Three High and One Rich" advantages—high throughput, reliability, consistency, and rich features—compares it with Kafka and RabbitMQ, presents six detailed reasons with code samples, a selection decision tree, common interview variants, memory mnemonics, and a concise conclusion for Java developers.

Delayed MessageJava InterviewMessage Queue
0 likes · 15 min read
Why RocketMQ Beats Kafka and RabbitMQ in Java Interviews: 6 Core Advantages
Java Architect Handbook
Java Architect Handbook
Apr 7, 2026 · Databases

Master MySQL’s Redo, Undo, and Binlog: Deep Dive for Interview Success

This article provides a comprehensive interview guide on MySQL’s three core logs—redo log, undo log, and binlog—covering their architecture, roles in crash recovery, MVCC, replication, configuration commands, two‑phase commit workflow, and frequent follow‑up questions to help candidates ace database interview questions.

BinlogDatabase InterviewMySQL
0 likes · 13 min read
Master MySQL’s Redo, Undo, and Binlog: Deep Dive for Interview Success