How do I install the Java Modernization Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/java-modernization/SKILL.md and restart Claude Code. Both flows are detailed at https://claudskills.com/install/.

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

ClaudSkills / Engineering / languages

Java Modernization

Category: Engineering · Sub-category: languages

lang:java

Javaコードのモダン化・リファクタリング・現代的Javaの書き方に関するあらゆる作業に使用する。Java 8以前の旧来コードをJava 11/17/21/25のモダンスタイルへ書き換えるとき、var・record・switch式・テキストブロック・sealed class・仮想スレッドなどの新機能を使う方法を調べるとき、Stream APIやOptional・java.time APIの適切な使い方を知りたいとき、あるいは「このJavaコードをモダンにしたい」「古い書き方を直したい」「Java○○の機能を使いたい」「ボイラープレートを減らしたい」「Lombokをrecordに変えたい」と言われたときは必ずこのスキルを使うこと。

What this skill does

Java Modernization is a community-contributed Claude Code skill in the languages sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/java-modernization/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Java Modernization skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It is part of the open ClaudSkills registry, a community-curated catalog of 56,000+ capabilities you can install for Claude Code — the Claude CLI agent.

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/java-modernization
curl -L https://claudskills.com/skills/java-modernization/SKILL.md \
  -o ~/.claude/skills/java-modernization/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/java-modernization/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/java-modernization/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\java-modernization\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

More Engineering skills

Browse all Engineering skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Engineering skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Code skills. · What's New · Install guide · About · llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: GifPerfect · AspectPerfect · SlomoPerfect · Ucaption · UTagger · AutoXPoster · TestYourSkills