=================================================================
Accessing static vs. non-static (public) members (fields/methods)
=================================================================

. To access a non-static field (or a non-static method), you must
  create an instance of the class and use an object reference to
  the object to access the fields or methods, for example:

  Point p = new Point(10, 20, 30);
  p.x = p.x + 10;
  p.distanceFromOrigin();

  Here I assumed that x is a public field.


. To access a static field or a static method, you access them using
  the class name directly as in: 

  double d = Math.PI;
  int i = Math.abs(-45);
  int j = Integer.parseInt("3425")
  ArrayTools.printArray(...)
  Account.getSumBalance()

  Class name is actually the meta-object, i.e., class-object, that
  contains all the elements that make up the class.  That is, there is
  a static object named the same as the class name that you are
  defining, and the meta-object is available to the programmer at
  run-time.

  I am not going to say much more than this about meta-objects - this
  subject is beyond the scope of this course.