What is the best way to clean up an Object in Java?

Question

We don\'t have any destructor in Java as we have in C++.

Q1. How should we clean up any Object in java.

Q2. Is there any a

Answer 1

Your objects in Java really never need to be "Cleaned Up", GC Just works. Nearly every time I've seen someObject=null in code, it's been someone who didn't know what they were doing. There IS a theoretical case for this, but it's really an edge case and generally better handled in other ways like the recently added try with resource.

If you have an external resource that needs to be cleaned up when an object is no longer used, that is another matter.

There are "Reference" classes that will hold a special type of Reference to your class--it will not stop garbage collection, but can notify you when the class is garbage collected (Through a callback if you like). Look up WeakReference, PhantomReference, etc.

These are reliable and work in a much more deterministic way than a actual "finalize" method would because the callback is outside your class, so you don't end up executing a method in some pre-deleted or half-deleted state and the problems that could cause.