This document discusses three object-oriented design patterns: Hide Method, Replace Constructor with Factory Method, and Encapsulate Downcast. It proposes hiding a method, replacing a constructor with a factory method that returns the type of object based on parameters, and encapsulating downcasting within a method to avoid errors.

1. Hide Method
Replace Constructor with Factory Method
Encapsulate Downcast
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2. Hide Method

3. Hide Method
When Using a method
inside Only

4. Hide Method
Public -> Private

5. Replace
Constructor with
Factory Method

6. With Type Code

7. With String

8. With Explicit Method

9. Encapsulate Downcast

10. Why? Discuss!

11. Thank You!