the general way to create an object is as follows: object name variable name = new object name ();

can it all be written this way: Object variable name = new object name ()

such as
Object student = new student ();
Object person= new person ();
.
.

A rookie, curious to ask, this seems to be called "upward transformation".
if I use Object to create objects in my future work, will it have any bad impact on the program?