Write a class Point with instance variables as: xCoordinate(int) and yCoordinate(int). Write public instance methods (getters & setters) for each instance variable. Now, write a class Circle with private instance variables as radius and Pi (value is 3.14). Write public setter, getter for radius, Area method for calculating Area, Draw method for radius.  Formula for calculating area=pi*r^2  Formula for calculating radius= Math.sqrt (xCordinate^2+yCordinate^2) a. Extend a Circle class from Point class such as Class Circle extends Point b. Write a Default constructor in Circle class that sets radius, xCoordinate & yCoordinate to some default value e.g. -1; c. Write a Parameterized constructor in Circle class which takes xCoordinate, yCoordinate and radius as a parameter. Now write a ColoredCirlce class with private instance variable as color (String) and public setter & getters. Extend the ColoredCircle from Circle and do the following operations. d. Write a default constructor that sets radius, xCoordinate, yCoordinate & color to some default value e.g. -1 or “empty”; e. Write a parameterized constructor that takes radius, xCoordinate, yCoordinate & color as a parameter and initialize instance variables (same as point c). Now write a Demo class which contains main method in order to demonstrate the behavior of all classes. f. Call parameterized constructor of Circle class as: Circle circle=new Circle(2,3,4.5); g. Print attributes and behavior of circle h. Call parameterized constructor of ColoredCircle class as: ColoredCircle cCircle=new ColoredCircle(2,3,4.5, “green”); i. Print attributes of cCircle.

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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Question

Write a class Point with instance variables as: xCoordinate(int) and yCoordinate(int). Write public instance methods (getters & setters) for each instance variable. Now, write a class Circle with private instance variables as radius and Pi (value is 3.14). Write public setter, getter for radius, Area method for calculating Area, Draw method for radius.
 Formula for calculating area=pi*r^2
 Formula for calculating radius= Math.sqrt (xCordinate^2+yCordinate^2)

a. Extend a Circle class from Point class such as Class Circle extends Point
b. Write a Default constructor in Circle class that sets radius, xCoordinate & yCoordinate to some default value e.g. -1;
c. Write a Parameterized constructor in Circle class which takes xCoordinate, yCoordinate and radius as a parameter.

Now write a ColoredCirlce class with private instance variable as color (String) and public setter & getters. Extend the ColoredCircle from Circle and do the following operations.
d. Write a default constructor that sets radius, xCoordinate, yCoordinate & color to some default value e.g. -1 or “empty”;
e. Write a parameterized constructor that takes radius, xCoordinate, yCoordinate & color as a parameter and initialize instance variables (same as point c).

Now write a Demo class which contains main method in order to demonstrate the behavior of all classes.
f. Call parameterized constructor of Circle class as: Circle circle=new Circle(2,3,4.5);
g. Print attributes and behavior of circle

h. Call parameterized constructor of ColoredCircle class as: ColoredCircle cCircle=new ColoredCircle(2,3,4.5, “green”);
i. Print attributes of cCircle.

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