Thinking in Objects

The real world is made up of nouns — people, things, places, ideas. OOP models them as classes. Find the nouns in each scenario.

Click a word in the scenario — nouns become class candidates

Scenario Found 0 of 0 nouns

Class Candidates Click nouns to fill

People & Roles

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Things

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Places

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Concepts

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★ All nouns found!

Why nouns? Classes represent things — not actions. Customer is a class, but buy is a method on that class. When you read a system description, the nouns are usually the classes; the verbs become methods inside them. Up next: KNOW vs DO — what each class is responsible for.

KNOW vs DO Responsibilities →