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In Java, Create a static function that sets the object's reference to null.

provide another static function which calls getInstance and delete on return value

Have a reference count decremented each time the object is released and delete the obj when it reaches 0

static method will not have this pointer..so it is not a suicide ...

to avoid accidental delete move destructor to private

make a static object so that compiler automatically deletes in the end of the programm.....but then it might have issues like dead reference problem.....

Singleton& Singleton::GetInstance()
{

static Singleton single;
return single;
}

Declare a friend class inside the class, In friend class it provide desconstructor

create another function for destroying the static instance and reset it to 0.

Refer to Modern C++ Design for many impl for singleton which handles destruction based on policy. Like what is the Life you want to keep for singleton object and also it tries to handle "static order fiasco" also.