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

There's no direct way. Other technique include:

• Passing a holder object (a bit like your 1-ary array)
• Using, e.g., an AtomicInteger
• Passing a more useful object from a business perspective that happens to be mutable
• A callback to a custom interface for receiving the result

If you think about it, the array trick is not dissimilar to passing a T* in C/C++