From : http://java.boot.by/scjp-tiger/
Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.
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Given a scenario, develop code that demonstrates the use of polymorphism. Further, determine when casting will be necessary and recognize compiler vs. runtime errors related to object reference casting.

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Chapter 5. OO Concepts Home  Explain the effect of modifiers on inheritance with respect to constructors, instance or static variables, and instance or static methods.