What is the differance if we make variable or method static in java?

Question

it is give us an additional advantage
we can call the variable or method by the name of class followed by dot followed by the name of variable of method
and if we make an abstract class we can not create an object so we can
not using the variable or method so we make it static to call it by easy way

Answer 1

yes thank you that is so true because the static it self at execution time it is carryout in different place that object caryout in it so if we want to now how many object created from class person as you say in the example we define a static variable and make it ++
in the constructor of the class so at each time we create object the variable is increment
and we know it
thank you for your illustrations 😊

Answer 2

The real meaning of a static attribute or method is that they are in the class level. We use a class to create objects. You can create any number of object from that class. But if you want to keep a common property to all of your created object, you will have to use the static variable.
As an example take a person class. Users will create numbers of persons. if you want to count how much persons have been created, you cannot use a instant variable in the person class. You have to use a static variable because the person counter is a common factor to person objects.

I gave you a brief introduction. Thanks.