Object-oriented programming allows procedures about objects to be created whose exact type is not known until runtime. For example, a screen cursor may change its shape from an arrow to a line ...

In object-oriented programming, we sometimes describe objects as having state and behavior. These are the object’s members and methods. It’s part of the useful organization that objects give us.

Instances are the foundation of object-oriented programming. Static methods are ones that aren't passed in any instance variables. As such, if you move static methods and static variables into a ...