how to migrate JDK-21

[bodhili]

What problem are you trying to solve?

• how to migrate to JDK-21, but I cannot found the docs about migrate to JDK-21, there is only have migrate to JDK-21 docs

Describe the solution you'd like

• It can use to migrate to JDK-21

Have you considered any alternatives or workarounds?

• no

Additional context

• only JAVA projects

Are you interested in contributing this feature to OpenRewrite?

• y

[timtebeek]

Hi! There's a guide to upgrading to Java 17 here:
https://docs.openrewrite.org/running-recipes/popular-recipe-guides/migrate-to-java-17

The steps to upgrade to Java 21 are exactly the same, only replacing 17 with 21 in the recipes you'll run:
https://docs.openrewrite.org/recipes/java/migrate/upgradetojava21

I hope that helps you there! I'll close this issue as there's no code changes needed on our end.