| Assume we create a rectangle named rect as described in the previous section. To move rect to a new location, |
| we would write: |
| rect.origin = new Point(15, 30); |
| This statement moves the rectangle by setting its point of origin to a new position. rect.origin is the name of rect's origin variable. |
| The Rectangle class has two other variables-- width and height-- that are accessible to objects outside of the class. We can use the same notation to access them and calculate the rectangle's area using this statement |
| area = rect.height * rect.width;; |
| In general, to refer to an object's variables, append the name of the variable to an object reference with an intervening period (.): |
| objectReference.variable |
| The first part of the variable's name, objectReference, must be a reference to an object. |
   |