How to create IN OUT or OUT parameters in Java

Question

In PL/SQL (or many other languages), I can have IN OUT or OUT parameters, which are returned from a procedure. How can I achieve a similar thing in Java?

I know this

Answer 1

Java copies anything you pass as an argument. If you pass a primitive, inside method you have copy of that primitive, and no modifications will affect the actual variable outside method. If you pass object, you pass copy of reference, which actually references to the original object. This is the way how you can propagate modifications to the context of something that called the method - by modifying the state of the object that the reference is 'pointing' to. See more on this: Does Java Pass by Value or by Reference?