Java Object Oriented Programming Example Code-2

Choices for implementing changing behavior

Using Inheritance to support changing behavior
- Subclasses provides changing behavior
- Use it when changing behaviors are aligned only with subclasses
- Computing monthly pay for all Employee types – hourly employee and salaried employee
Using Interface to support changing behavior
- Classes implement the interface
- Use it when changing behavior need to be imposed to classes that are not related via inheritance
- Only salaried employees and board members get bonuses
Use Composition to support changing behavior
- Objects with changing behavior injected to the target class
- Use it when runtime selection of behavior is desired
- Use it when reuse of the behavior can be used in other classes

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Java Object Oriented Programming Example Code-2

Choices for implementing changing behavior

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