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java-17-to-21

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Upgrade Java projects from 17 to 21 safely.

Software Engineering#migration#java#upgrade#pattern-matching#virtual-threads#jdk#record-patterns
Authorbrunoborges
Version1.0.0
Installs0

System Documentation

What problem does it solve?

Upgrading Java projects from JDK 17 to JDK 21 can be risky and error-prone without a structured plan. This skill provides a guided, best-practice migration path and actionable steps to adopt modern features safely.

Core Features & Use Cases

  • Guidance on migrating to JEP 441 (switch pattern matching), JEP 440 (record patterns), JEP 444 (virtual threads), and JEP 431 (sequenced collections).
  • Incremental upgrade approach with build-tool compatibility checks, testing strategies, and risk controls.
  • Real-world use case: migrating a codebase to leverage new language features while ensuring compatibility and performance.

Quick Start

Follow the upgrade plan to migrate a sample Java project from JDK 17 to 21 and validate changes with targeted tests.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

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Please help me install this Skill:
Name: java-17-to-21
Download link: https://github.com/brunoborges/gh-appmod/archive/main.zip#java-17-to-21

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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