Yes, and in Java, capital-O Object is primarily used as a class, not as an object that you work with directly!

Alan Kay himself said he regrets coining the term as "object" oriented, and wishes he had emphasized "messages":

https://wiki.c2.com/?AlanKayOnMessaging

And Object, in this case (big O), is the name of a class.

Not everything is an object, as someone said, there are also primitives.

There are many other "things" in Java that are not objects (operators, statements, etc.).

Kotlin does set some of this straight. Everything inherits (indirectly) from the Any class. And primitives do not exist in Kotlin (as in Ruby or Smalltalk).

Havent used Java for ages but are ints amd double for example really objects? Iirc they are primitives

Those types exist as both classes and primitive types. Eg, "double" (primitive) vs "Double" (class which inherits from Object).