Question

I need to know how many objects of some type exist in my system any time. Standard method with static variable and and increment/decrement in constructor/distructor doesn’t work because missed Object.finalize method.

Answer 1

As a brutforce answer you can produce all your objects with special singleton factory, where you can increment count, when new object is produced, and delete them through this factory to:

Object newOne = ObjectsFactory.getInstance().getNewObject(); // in this method count++
...
...
// we don`t need newOne anyMore
ObjectsFactory.getInstance().releaseObject(newOne); // here count--
newOne = null;  // let gc do its work.

This approach do not give you exactly results, but something roundly.