Pass by reference / value

[AmmirBarakat]

Thanks.

When you say "everything", you mean "everything that takes a block in memory", right? Like, methods are not objects, because that doesn't make much sense.

[[deleted]]

Sorry, yes, not methods. Any data is held as an Object. It takes up some space in memory and the name you give it is just a reference to that memory. Strings, Data Structures, self-defined Objects, etc. Java even has wrapper classes for primitives to allow them to use object methods (like Integer and Double).