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Java Tech Enthusiast
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Java Tech Enthusiast

Sharing computer programming language knowledge, focusing on Java fundamentals, data structures, related tools, Spring Cloud, IntelliJ IDEA... Book giveaways, red‑packet rewards and other perks await!

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Recent Articles

Latest from Java Tech Enthusiast

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Java Tech Enthusiast
Java Tech Enthusiast
Aug 3, 2026 · Industry Insights

Amazon’s Claude AI Project Burns $12.15 M—860% Over Budget, Hidden for 5 Months

Internal Amazon reports reveal that a seemingly simple Claude‑based data‑matching task cost $12.15 million—860% over its budget—and went unnoticed for five months, with two additional AI projects overrunning by $5.41 million and $13.4 million, highlighting the urgent need for robust AI cost governance.

AI GovernanceAI budgetingAI cost management
0 likes · 9 min read
Amazon’s Claude AI Project Burns $12.15 M—860% Over Budget, Hidden for 5 Months
Java Tech Enthusiast
Java Tech Enthusiast
Aug 2, 2026 · Backend Development

Boost Excel Import/Export Performance in Spring Boot with EasyExcel

The article explains why native Apache POI causes memory‑explosion and maintenance headaches for Excel import/export in Java back‑ends, introduces Alibaba's EasyExcel as a low‑memory, annotation‑driven alternative, and provides step‑by‑step Spring Boot code for exporting, importing, custom conversion, validation, complex headers, pagination, template filling, and common pitfalls with concrete solutions.

AnnotationEasyExcelExcel export
0 likes · 16 min read
Boost Excel Import/Export Performance in Spring Boot with EasyExcel
Java Tech Enthusiast
Java Tech Enthusiast
Aug 1, 2026 · Artificial Intelligence

‘Do You Know Claude Code?’ – Master CLAUDE.md, Skills, Subagents, MCP, Hooks & Plugins

The article explains how to turn Claude Code from a forgetful assistant into an engineered AI teammate by using CLAUDE.md for persistent project context, Skills for on‑demand knowledge, Subagents for isolated tasks, MCP for external tool integration, Hooks for enforced policies, and Plugins for easy sharing across projects.

AIClaude CodeMCP
0 likes · 26 min read
‘Do You Know Claude Code?’ – Master CLAUDE.md, Skills, Subagents, MCP, Hooks & Plugins
Java Tech Enthusiast
Java Tech Enthusiast
Jul 31, 2026 · Artificial Intelligence

Mastering Claude Code: From CLAUDE.md to Plugins – A Complete Engineering Guide

This article explains how to turn Claude Code from a forgetful one‑off assistant into a fully engineered teammate by using persistent CLAUDE.md files, on‑demand Skills, independent Subagents, Model Context Protocol (MCP) integrations, Hooks for enforcement, and Plugins for easy packaging and sharing, complete with real‑world examples and step‑by‑step configurations.

AI engineeringClaude CodeMCP
0 likes · 25 min read
Mastering Claude Code: From CLAUDE.md to Plugins – A Complete Engineering Guide
Java Tech Enthusiast
Java Tech Enthusiast
Jul 30, 2026 · Backend Development

Why Spring Boot 4.0 Dropped Undertow and How to Migrate Your Projects

Spring Boot 4.0 removes support for the Undertow embedded server because it is not compatible with the required Servlet 6.1 baseline and lacks sufficient maintenance, prompting developers to switch to Tomcat or Jetty and follow detailed migration steps to avoid startup failures and configuration loss.

JettyMigrationServlet 6.1
0 likes · 12 min read
Why Spring Boot 4.0 Dropped Undertow and How to Migrate Your Projects
Java Tech Enthusiast
Java Tech Enthusiast
Jul 29, 2026 · R&D Management

5 Toxic Habits That Sabotage Your Tech Team

The article identifies five common managerial pitfalls—micromanaging like a surveillance camera, ignoring process in favor of outcomes, using fines to force discipline, publicly shaming while privately praising, and letting mood dictate decisions—and explains how each erodes trust, productivity, and team health.

R&D cultureprocess metricssoftware engineering
0 likes · 9 min read
5 Toxic Habits That Sabotage Your Tech Team
Java Tech Enthusiast
Java Tech Enthusiast
Jul 29, 2026 · Industry Insights

How Google Spent a Decade to Replace Developers' Favorite IDEs

Google’s massive engineering organization struggled with fragmented IDE preferences, leading to costly plugin ecosystems, but through a 20%‑time culture it built internal tools like MagicJar, Cider, and eventually Cider V, which now powers 80% of its engineers by 2023, illustrating a unique path to unified cloud‑based development.

BazelCiderCloud IDE
0 likes · 9 min read
How Google Spent a Decade to Replace Developers' Favorite IDEs