What is the use of a private static variable in Java?

Question

If a variable is declared as public static varName;, then I can access it from anywhere as ClassName.varName. I am also aware that static members a

Answer 1

Static variables have a single value for all instances of a class.

If you were to make something like:

public class Person
{
    private static int numberOfEyes;
    private String name;
}

and then you wanted to change your name, that is fine, my name stays the same. If, however you wanted to change it so that you had 17 eyes then everyone in the world would also have 17 eyes.