> What JVM do I use? latest LTS (longterm-support) version, so currently 21, next 25 (late 2025). > Does it matter? new is always better > what if I have to

> What JVM do I use? latest LTS (longterm-support) version, so currently 21, next 25 (late 2025). > Does it matter? new is always better > what if I have to install/manage multiple versions? https://sdkman.io/ https://sdkman.io/ > If I want to write a web service can I use vanilla Java stdlib or do I have to use Spring or some framework? Spring > If I use Spring, do I have to get into the weeds of dependency injection yes, but it's not hard (or I've done it long enough) > other complexity that might just be inherent complexity when have to deal with a webservice. personally I dislike have to configure security So basically go to Spring Initializr (https://start.spring.io/ https://start.spring.io/) pick the latest LTS Java&Maven (or Kotlin&Gradle-Kotlin) and You're off to the races.