Selected Java Interview Questions
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Selected Java Interview Questions

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Selected Java Interview Questions
Selected Java Interview Questions
Oct 6, 2025 · Backend Development

Boost Spring Boot Performance: Switch from Tomcat to Undertow and Optimize Settings

This guide explains why Tomcat may become a bottleneck under high concurrency, shows how to replace it with the lightweight Undertow server in Spring Boot 3, and provides detailed configuration snippets for thread pools, timeouts, request size limits, compression, HTTP/2, access logging, and monitoring recommendations.

JavaSpring BootTomcat replacement
0 likes · 7 min read
Boost Spring Boot Performance: Switch from Tomcat to Undertow and Optimize Settings
Selected Java Interview Questions
Selected Java Interview Questions
Sep 24, 2025 · Backend Development

How to Build a Math Image Captcha with Spring Boot 3.5.5

This step‑by‑step tutorial shows Java beginners how to create a Spring Boot 3.5.5 application that generates a math‑expression image captcha, stores the answer in session or an in‑memory map, provides REST endpoints, handles CORS, and includes a complete front‑end page with refresh and validation logic.

CaptchaJavaSpring Boot
0 likes · 30 min read
How to Build a Math Image Captcha with Spring Boot 3.5.5
Selected Java Interview Questions
Selected Java Interview Questions
Sep 22, 2025 · Backend Development

Quickly Diagnose Spring Boot + Nacos + MySQL Microservice Failures

This guide provides a step‑by‑step troubleshooting workflow for Spring Boot microservices using Nacos as a config/registry and MySQL as the database, covering log inspection, process checks, port listening, network connectivity, configuration validation, database connectivity, system resources, startup commands, and an optional one‑click diagnostic script.

LinuxMySQLNacos
0 likes · 9 min read
Quickly Diagnose Spring Boot + Nacos + MySQL Microservice Failures
Selected Java Interview Questions
Selected Java Interview Questions
Sep 21, 2025 · Backend Development

Unlock Java’s New Power: Why JDK 17’s “Magic Syntax” Beats JDK 8

This article explains why upgrading from Java 8 to the long‑term‑support JDK 17 is essential, detailing record types, sealed classes, pattern matching, text blocks, var inference, enhanced switch, and other modern features that dramatically reduce boilerplate, improve readability, and boost performance for backend developers.

JDK 17Sealed ClassesStream API
0 likes · 14 min read
Unlock Java’s New Power: Why JDK 17’s “Magic Syntax” Beats JDK 8
Selected Java Interview Questions
Selected Java Interview Questions
Sep 16, 2025 · Backend Development

Mastering Asynchronous Responses in Spring: CompletableFuture vs ResponseBodyEmitter

This guide explains how to implement high‑performance asynchronous APIs in Spring Web using CompletableFuture and ResponseBodyEmitter, covering controller and service code, configuration, request lifecycle, client handling, Nginx settings, and practical recommendations for choosing the right approach.

AsynchronousCompletableFutureJava
0 likes · 12 min read
Mastering Asynchronous Responses in Spring: CompletableFuture vs ResponseBodyEmitter
Selected Java Interview Questions
Selected Java Interview Questions
Sep 14, 2025 · Backend Development

Mastering Spring Boot with KingbaseES: Which Connection Pool Wins?

This article explains the importance of database connection pools in Spring Boot projects using KingbaseES, compares four popular pools (DBCP, C3P0, Druid, HikariCP), provides configuration examples, highlights common pitfalls, and offers practical tuning and monitoring guidance for optimal performance.

Database Connection PoolDruidHikariCP
0 likes · 18 min read
Mastering Spring Boot with KingbaseES: Which Connection Pool Wins?