String is passed by value or reference?

Question

String is passed by value or reference? As it is an object I think pass by reference but when I tried to create an impure method based on strings then the string wasn’t mutated .... please help 🙏

Answer 1

Everything in java is passed by value

Answer 2

In java, string objects are immutable. Immutable simply means unmodifiable or unchangeable.
Once string object is created its data or state can't be changed but a new string object is created.

I guess, that
the string object that was first referenced by „reference“ was not altered, all that you did was make „reference“ refer to a new string object.

Answer 3

in java, parameters are passed by value. An object variable is in fact a reference to the content of that variable in memory, and that reference is passed by value, that's why you can modify the members of a mutable object within a function.
String are non mutable , you can't change them.