Object-Oriented Programming Example Mailing A Letter

Think about posting a letter

You have probably never thought about posting a letter in an object oriented way. In fact, it is a perfect example to show how object oriented works.

What do we need to post a letter ?

  • An envelope
  • A stamp
  • The letter 🙂
  • Paper

Have you realized each of these are an object ?

Define each of the objects

What do you need for a letter ?

How about some paper ?

Paper is an object.

A letter may have one or more pieces of paper.

How do we want to specify paper.

It’s size

It’s weight ( 80 or 100 g )

It’s colour

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