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20. Imagine that you are going to write a program to play card games. Consider a design with a Card class and 52 sub- classes, one for each of the unique playing cards (for example, NineOf Spades and JackOfClubs). Is this a good design? If so, why? If not, why not, and what might be a better design?

20. Imagine that you are going to write a program to play card games. Consider a design with a Card class and 52 sub- classes, one for each of the unique playing cards (for example, NineOf Spades and JackOfClubs). Is this a good design? If so, why? If not, why not, and what might be a better design?

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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18. What is the difference between an is-a and a has-a relationship? How do you create a has-a relationship in your code? 19. Imagine a Rectangle class with objects that represent two-dimensional rectangles. The Rectangle has width and height fields with appropriate accessors and mutators, as well as getArea and getPerimeter methods. You would like to add a Square class into your system. Is it a good design to make Square a subclass of Rectangle? Why or why not? 20. Imagine that you are going to write a program to play card games. Consider a design with a Card class and 52 sub- classes, one for each of the unique playing cards (for example, NineOf Spades and JackOfClubs). Is this a good design? If so, why? If not, why not, and what might be a better design? 21. In Section 9.2 we discussed adding functionality for dividend payments to the Stock class. Why was it preferable to create a DividendStock class rather than editing the Stock class and adding this feature directly to it? Section 9.5: Interfaces 22. What is the difference between implementing an interface and extending a class? 23. Consider the following interface and class: } public interface I { public void m1(); public void m2(); } public class C implements I { // code for class C What must be true about the code for class C in order for that code to compile successfully?
Transcribed Image Text:18. What is the difference between an is-a and a has-a relationship? How do you create a has-a relationship in your code? 19. Imagine a Rectangle class with objects that represent two-dimensional rectangles. The Rectangle has width and height fields with appropriate accessors and mutators, as well as getArea and getPerimeter methods. You would like to add a Square class into your system. Is it a good design to make Square a subclass of Rectangle? Why or why not? 20. Imagine that you are going to write a program to play card games. Consider a design with a Card class and 52 sub- classes, one for each of the unique playing cards (for example, NineOf Spades and JackOfClubs). Is this a good design? If so, why? If not, why not, and what might be a better design? 21. In Section 9.2 we discussed adding functionality for dividend payments to the Stock class. Why was it preferable to create a DividendStock class rather than editing the Stock class and adding this feature directly to it? Section 9.5: Interfaces 22. What is the difference between implementing an interface and extending a class? 23. Consider the following interface and class: } public interface I { public void m1(); public void m2(); } public class C implements I { // code for class C What must be true about the code for class C in order for that code to compile successfully?
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