Java - Are objects in a list held by value or reference?

Question

Simple question, does a list in Java hold objects by value or reference? If I place an object in a list and later on change one of its values, is the one in the list going to have the updated value?

Answer 1

does a list in Java hold objects by value or reference?

The List is an ordered collection that contains object references.

If I place an object in a list and later on change one of its values, is the one in the list going to have the updated value?

You can change/update only mutable objects. You cannot update immutable (e.g List<String>) objects via their references.