Core Java systems are being written and updated at: Oracle, Amazon, Google, Netflix, IBM and almost all the Fortune 500 companies.

Java is also used by Facebook, Microsoft, Salesforce, Apple, and many other companies that aren't necessarily known for their Java development.

Java usually is the base for every core banking system that's not old enough to have been written in COBOL (and even those are being migrated to Java in many cases) or hasn't been written from scratch in .NET.

The same Java is also used by governments throughout the world.

If Oracle vanishes completely tomorrow, there's huge incentives for a community initiative to completely take it over ASAP. There's probably tens of billions of dollars in existing code bases that have to be maintained and extended.

More than that, Java's already 23 years old. It's not a new language. Plus: https://en.wikipedia.org/wiki/Lindy_effect

Ten years is a very short time for a programming language. Python is decades old and hasn't hit its peak popularity yet. I don't know of a single mainstream language that has died, except for perhaps ColdFusion or ActionScript.

I really hope not. Modern Java is productive, fun and better performing than Go.

Modern Java is a pleasant experience compared to Go.

10 years is a long time in any business, and Java has been around more than 20. It is pervasive in enterpriseland; if nobody wrote a single line of greenfield Java code it will be around for decades. The COBOL of the modern era!

Java underpins Scala, Kotlin and Clojure.

So not just all the big corporates but plenty of tech companies like Facebook, Uber, Spotify, Twitter, Linkedin, Netflix, Apple, Google etc all rely heavily on it.