what is the difference between pass by reference and call by reference?

Question

what is the difference between pass by reference and call by reference in java ?

Answer 1

Java does not pass any variables by reference.

It is tempting to think of objects being passed by reference in Java -- but harmful. Variables of object type are references. When passed, they are passed by value.

In other languages, pass-by-reference and call-by-reference are the same thing.

Edit: More detail is provided in the existing stackoverflow question "Is Java pass by reference?" (Spoiler: No.)