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 ...

This class does not focus on object-oriented programming; however, we will examine many examples of object-oriented systems written in Java, Python, and other languages. A primary focus will be the ...

viewing and totalling are examples of its behavior. Objects (individual invoices) inherit this behavior and combine it with their own data elements. See CRC cards and object-oriented programming.