Ch4-2 - EE322C DataStructures Chapter4:Inheritance(Part2/2...

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Ramesh Yerraballi 4-1 EE 322C Data Structures Chapter 4:Inheritance (Part 2/2)
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Ramesh Yerraballi 4-2 Design Hierarchies We will discuss the  hierarchy of shapes as an  polymorphism/ inheritance   example public static totalArea(WhatType Circle Shape Rectangle Square
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Ramesh Yerraballi 4-3 abstract  methods and classes No abstract: public class Shape { public double area() { return -1; } } With abstract: public abstract class Shape { public abstract double area(); } Abstract methods/classes  represent placeholders An abstract method declares  functionality that all derived  classes must eventually  implement. So, it says  what  an  object can do, leaving the  derived class to provide the  implementation  ( how  it is  done) A class with at least one  abstract method must be an  abstract class
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Ramesh Yerraballi 4-4 Multiple Inheritance Java does NOT support multiple  inheritance
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