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0 pointsteknopaul3y ago0 comments

When I say move across systems, I mean from vm to vm not from lin to win.

While a .class file will technically run on any jvm. A java application is usually more complicated and Uber jars don't work if you have stuff in meta-inf e.g. Spring.

I am primarily a java dev and I have no tools or own code that run with java -jar some.jar.

0 comments

ElectricalUnion3y ago

> While a .class file will technically run on any jvm.

Not really, JDK 11 and further finally started removing deprecated implementation details, so you can't really run any class on any JVM - you ideally lockstep development and production JDK versions.

> A java application is usually more complicated and Uber jars don't work if you have stuff in meta-inf e.g. Spring.

This is more about the java application being complicated, and messing up with JAR metadata, not about stuff "not working"; in my experience, uber-jars built by Spring Boot "just work".

> I am primarily a java dev and I have no tools or own code that run with java -jar some.jar.

Most of my deployments were fleets of Spring Boot based services deployed with Containers with `RUN java -jar /app/my-project-name-1.0-RELEASE.jar`

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