10 Object-Oriented Programming: Polymorphism and Interfaces
Objectives
In this chapter you’ll:
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Learn the concept of polymorphism and how it enables “programming in the general.”
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Use overridden methods to effect polymorphism.
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Distinguish between abstract and concrete classes.
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Declare abstract methods to create abstract classes.
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Learn how polymorphism makes systems extensible and maintainable.
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Determine an object’s type at execution time.
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Declare and implement interfaces, and become familiar with the Java SE 8 interface enhancements.
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