I don't trust Oracle to not sue me whenever they feel like it. I refuse to work on any Java codebase as long as Oracle has anything to do with it.

Isn’t OpenJDK or other open source sdk enough to not worry about Oracle? Genuine question.

> OpenJDK (the "Name") is a trademark of Oracle America, Inc. ("Oracle") (the "Trademark Owner").

https://openjdk.org/legal/openjdk-trademark-notice.html

Not worth the risk of stepping on their toes. There are plenty of other good programming languages to choose from.

The trademark only matters if you publish the trademarked term somewhere.

If you bake a cake, it probably contains a dozen ingredients that have trademarked names. You aren't in any legal risk from doing so.