Directory / Awesome Copilot skills (GitHub) / java-upgrade

java-upgrade

Upgrade a Java project to a newer JDK (11 to 17, 17 to 21, 21 to 25) and adopt the new language and library features. Detects the current Java version from the build files, then loads only the matching per-version guide. Use when the user asks to upgrade Java, modernize Java code, or adopt records, sealed classes, pattern matching, virtual threads or other new Java features. For automated end-to-end upgrades see the modernize-java plugin.
Description from the SKILL.md front matter.

Install

GitHub CLI v2.90+ (Copilot by default)

gh skill install github/awesome-copilot java-upgrade

For Claude Code

gh skill install github/awesome-copilot java-upgrade --agent claude-code

For Codex

gh skill install github/awesome-copilot java-upgrade --agent codex

Commands follow each host's documentation (GitHub Copilot, plus Claude Code, Codex, Cursor via gh skill docs). gh skill needs GitHub CLI 2.90 or later and is in public preview.

Listed from GitHub + community contributors's catalog, not reviewed by us. Read the source before installing.

Catalog: Awesome Copilot skills (GitHub)
Author: Not stated in the source
Source code: github/awesome-copilot
License: MIT (repository license)
Repository stars: 40,178 for github/awesome-copilot (the whole catalog repo)
Added to catalog: Not tracked for this source
Last change: 2026-10-16 (last push to the repo)

What it contains

Skills: 1

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