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Liskov Substitution Principle (LSP)

Liskov Substitution Principle (LSP)

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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Liskov Substitution Principle (LSP)
a. Propose a way to fix the problem in there.

public class Rectangle { private int length; private int breadth; public int getLength () { return length; public class Square extends Rectangle { @Override public void setBreadth (int breadth) { super.setBreadth (breadth); super.setLength (breadth); } public void setLength (int length) { @Override public void setLength (int length) { super.setLength (length) ; super.setBreadth(length); this.length = length; } public int getBreadth () { return breadth; Bad Design } } public void setBreadth (int breadth) { public void calculateArea (Rectangle r) { r.setBreadth (2) ; r.setLength (3) ; assert r. getArea () assert r.getLength (() assert r.getBreadth () this.breadth = breadth; } public int getArea () { == 6 : printError("area", r); 3 : printError ("length", r); == 2 : printError ("breadth", r); return this.length * this.breadth; }
Transcribed Image Text:public class Rectangle { private int length; private int breadth; public int getLength () { return length; public class Square extends Rectangle { @Override public void setBreadth (int breadth) { super.setBreadth (breadth); super.setLength (breadth); } public void setLength (int length) { @Override public void setLength (int length) { super.setLength (length) ; super.setBreadth(length); this.length = length; } public int getBreadth () { return breadth; Bad Design } } public void setBreadth (int breadth) { public void calculateArea (Rectangle r) { r.setBreadth (2) ; r.setLength (3) ; assert r. getArea () assert r.getLength (() assert r.getBreadth () this.breadth = breadth; } public int getArea () { == 6 : printError("area", r); 3 : printError ("length", r); == 2 : printError ("breadth", r); return this.length * this.breadth; }
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