I'm guessing you meant "real life" instead of "real time". It's tough to apply some OO concepts to things outside software. But since you mentioned a family tree, suppose I have a father and son. I ask the father to put on some music and he plays a 1940's big band CD. I ask the son to put on some music and he plays Green Day. I send them both the same message, they both understand the message, but they do different things in response.
If I ask the dog to put on some music he just tilts his head and looks at me funny. He doesn't understand the message, no polymorphism at work.
A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
And tomorrow is the circus! We can go to the circus! I love the circus! We can take this tiny ad:
Programmatically Create PDF Using Free Spire.PDF with Java