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Inheritance Polymorphism Inf1 :: 2009/10 3 / 1 Animals Example, 1 Our base class: Animal Animal This week, read Chapters 7 8 of Head First Java
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public class Dog extends Mammal{ } Now, based on the above example, In Object Oriented terms, the following are true: Animal is the superclass of Mammal
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The implements keyword is used by classes by inherit from interfaces Interfaces can never be extended by the classes Example public interface Animal { }
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parent object • The idea behind inheritance in java is that you can Java Inheritance Example System out println(super color);//prints color of Animal class
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Tutorial 4 – Inheritance, Polymorphism In this example, getName() is equivalent to super Test java:12: error: constructor Animal in class Animal cannot be
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16 avr 2013 · Subclasses inherit all public variables and methods from superclass In this example, the MountainBike has a powerful break Animal java
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A class inheritance tree for the example we're going to work on: d play(); Which play() method is called -- the one in Dog, or the one inherited from Animal ? So Java waits to see what the ACTUAL object is rather than using the reference
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Inheritance allows us to take advantage of polymorphism because differ- For example, Chapter 4 discussed different types of Animals A Lion eats that all classes in Java inherently extend from even though it will never be explicitly
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definition of existing methods by providing Add mail address and cell number Example of inheritance tree Animal SalesMan Inheritance in Java: extends
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29 jan 2003 · What if you heard the phrase “code inheritance”? 1/29/2003 (c) University of Washington 03-12 Example: Representing Animals • Generic
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