Three Java Champions describe using GitHub Copilot for Java features, slide migrations, and UI bug fixes

Three Java Champions—Vlad Mihalcea, Patrick Baumgartner, and Frank Delporte—describe using GitHub Copilot while emphasizing that developers still must provide context, review output, and own shipped code. Reported examples include Mihalcea building a planned Hypersistence Optimizer event-history web app in two days instead of weeks and Baumgartner migrating about 900 slides across 15 decks in roughly 8-10 hours with visual and PDF verification.

Because Baumgartner paired the 900-slide migration with screenshot, PDF, and manual animation checks, teams considering Copilot for legacy migrations should plan verification artifacts as part of the work, not as an afterthought. The trade-off is extra setup and review in exchange for faster execution; the evidence is anecdotal from experienced Java users, and the article does not show defect rates or results for less experienced teams.