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

Well you are right public static variables are used without making an instance of the class but private static variables are not. The main difference between them and where I use the private static variables is when you need to use a variable in a static function. For the static functions you can only use static variables, so you make them private to not access them from other classes. That is the only case I use private static for.

Here is an example:

Class test {
   public static String name = "AA";
   private static String age;

   public static void setAge(String yourAge) {
       //here if the age variable is not static you will get an error that you cannot access non static variables from static procedures so you have to make it static and private to not be accessed from other classes
       age = yourAge;
   }
}