How to validate JWT Token - userInfo or is there a library or method call in Java?

Getting advice
1

Hello,

I’m pretty savvy with OAuth 2/OIDC but new to Keycloak. I have a need to authenticate a user given a JWT token. Normally I’d hit the UserInfo endpoint but in the Java SDK I don’t see a way to do that?
Is there such a method call and/or a local library call that will just let me validate the JWT token string (so I don’t have to pull the public keys remotely to verify the signature?)

Thanks!

-Frank