access specifiers in Java
In Java, access specifiers are the keywords which are used to define
the access scope of the method, class, or a variable.
In Java, there are four access specifiers.
* Public: The classes, methods, or variables which are defined as public,
can be accessed by any class or method.
* Protected: Protected can be accessed by the class of the same package,
or by the sub-class of this class, or within the same class.
* Default: Default are accessible within the package only.
By default, all the classes, methods, and variables are of default scope.
* Private: The private class, methods, or variables defined as private
can be accessed within the class only