I want a delete operator in Java. Why not?

The idea is simple: when I tell "delete some_object;" the system checks if the object can be deleted.
a) Object is not referenced by any other objects out of the reference cycle *=>* some_object object calls its destructor and then it is deleted, and the same should happen to all objects in the reference cycle. The reference some_object is set to null, as operator delete returns null.
b) Object is referenced by some other objects, which are not in a cycle of references, ending up at the some_object object itself *=>* some_object object is not deleted (destructor is not called), but the reference some_object is set to null (operator delete returns null) and the reference count of the some_object object (in the system) is decreased by 1.
Easy.
Why not?

grinice wrote:
b) Object is referenced by some other objects, which are not in a cycle of references, ending up at the some_object object itself *=>* some_object object is not deleted (destructor is not called), but the reference some_object is set to null Makes no sense. There can be multiple references to a given object, and you don't always own all of them. If you want to set one to null, you can already do that with ref = null;
Easy.If it's that easy, create your own language that does it.
Why not?Why?

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