Write a class called Circle with the required constructor and methods to get thefollowing output.Subtasks:1. Create a class called Circle.2. Create the required constructor. Use Encapsulation to protect the variables. [Hint:Assign the variables in private]3. Create getRadius() and setRadius() method to access variables.4. Create a method called area to calculate the area of circles.5. Handle the operator overloading by using a special method to calculate the radiusand area of circle 3.[You are not allowed to change the code below]Output:First circle radius: 4# Write your code here for subtasks 1-5c1 =Circle(4)First circle area: 50.26548245743669Second circle radius: 5print("First circle radius:" , c1.getRadius())Second circle area:print("First circle area:" ,c1.area())78.53981633974483Third circle radius: 9Third circle area:c2 = Circle(5)254.46900494077323print("Second circle radius:" ,c2.getRadius())print("Second circle area:" ,c2.area())с3 %3D с1 + с2print("Third circle radius:" ,c3.getRadius())print("Third circle area:" ,c3.area())

Create a class called circle and initialize the values to the data members of the class using the…

Write a class called Circle with the required constructor and methods to get the following output. Subtasks: 1. Create a class called Circle. 2. Create the required constructor. Use Encapsulation to protect the variables. Assign the variables in private] 3. Create getRadius() and setRadius() method to access variables. 4. Create a method called area to calculate the area of circles.

Write a class called Circle with the required constructor and methods to get the following output. Subtasks: 1. Create a class called Circle. 2. Create the required constructor. Use Encapsulation to protect the variables. Assign the variables in private] 3. Create getRadius() and setRadius() method to access variables. 4. Create a method called area to calculate the area of circles.

Programming Logic & Design Comprehensive

9th Edition

ISBN:9781337669405

Author:FARRELL

Publisher:FARRELL

Chapter11: More Object-oriented Programming Concepts

Section: Chapter Questions

Problem 9RQ

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(The Rectangle class) Following the example of the Circle class in Section 8.2,design a class named Rectangle to represent a rectangle. The class contains:■ Two double data fields named width and height that specify the width andheight of the rectangle. The default values are 1 for both width and height.■ A no-arg constructor that creates a default rectangle.■ A constructor that creates a rectangle with the specified width and height.■ A method named getArea() that returns the area of this rectangle.■ A method named getPerimeter() that returns the perimeter.Draw the UML diagram for the class and then implement the class. Write a testprogram that creates two Rectangle objects—one with width 4 and height 40and the other with width 3.5 and height 35.9. Display the width, height, area,and perimeter of each rectangle in this order.
Write a program in BlueJ using the_following hints. ‏1. Create a class named Book and declare the fields author , title and pages with suitable field types . 2. Declare the constructor and initialize the fields author and title with the assigned constructor parameter . 3. Name the constructor parameter as your own . 4. Add two accessor methods to the class getAuthor , getTitle and getPages — that return the author and title fields as their respective results . Add mutator method to change the pages of the Book class . 5. Add two methods , printAuthor and printTitle , to this Book class project . These should print the author and title fields , respectively , to the terminal window .
‏Write a program in BlueJ using the following hints. ‏ 1. Create a class named Book and declare the fields author, title and pages with suitable field ‏ types. ‏ 2. Declare the constructor and initialize the fields author and title with the assigned ‏ constructor parameter. ‏ 3. Name the constructor parameter as your own. ‏ 4. Add two accessor methods to the class getAuthor, getTitle and getPages—that return the ‏ author and title fields as their respective results. Add mutator method to change the ‏ pages of the Book class. ‏ 5. Add two methods, printAuthor and printTitle, to this Book class project.
Write a class encapsulating the concept of a student, assuming student has the following attributes: a name, a social security number, and a GPA (for instance 3.5). Include a constructor, the accessors and mutators, and methods toString() and equals(). Write a client class to test all the methods in your class.
The Rectangle class) Following the example of the Circle class in Section 9.2, design a class named Rectangle to represent a rectangle. The class contains: ■ Two double data fields named width and height that specify the width and height of the rectangle. The default values are 1 for both width and height. ■ A no-arg constructor that creates a default rectangle. ■ A constructor that creates a rectangle with the specified width and height. ■ A method named getArea() that returns the area of this rectangle. ■ A method named getPerimeter() that returns the perimeter.Draw the UML diagram for the class and then implement the class. Write a test program that creates two Rectangle objects—one with width 4 and height 40and the other with width 3.5 and height 35.9. Display the width, height, area, and perimeter of each rectangle in this order.
a. Write a FractionDemo program that instantiates several Fraction objects and demonstrates that their methods work correctly. Create a Fraction class with fields that hold a whole number, a numerator, and a denominator. In addition: Create properties for each field. The set access or for the denominator should not allow a 0 value; the value defaults to 1. Add three constructors. One takes three parameters for a whole number, numerator, and denominator. Another accepts two parameters for the numerator and denominator; when this constructor is used, the whole number value is 0. The last constructor is parameterless; it sets the whole number and numerator to 0 and the denominator to 1. (After construction, Fractions do not have to be reduced to proper form. For example, even though 3/9 could be reduced to 1/3, your constructors do not have to perform this task.) Add a Reduce() method that reduces a Fraction if it is in improper form. For example, 2/4 should be reduced to 1/2. Add an operator+() method that adds two Fractions. To add two fractions, first eliminate any whole number part of the value. For example, 2 1/4 becomes 9/4 and 1 3/5 becomes 8/5. Find a common denominator and convert the fractions to it. For example, when adding 9/4 and 8/5, you can convert them to 45/20 and 32/20. Then you can add the numerators, giving 77/20. Finally, call the Reduce() method to reduce the result, restoring any whole number value so the fractional part of the number is less than 1. For example, 77/20 becomes 3 17/20. Include a function that returns a string that contains a Fraction in the usual display formatâ€”the whole number, a space, the numerator, a slash (D, and a denominator. When the whole number is 0, just the Fraction part of the value should be displayed (for example, 1/2 instead of 0 1/2). If the numerator is 0, just the whole number should be displayed (for example, 2 instead of 2 0/3). b. Add an operator*() method to the Fraction class created in Exercise 11a so that it correctly multiplies two Fractions. The result should be in proper, reduced format. Demonstrate that the method works correctly in a program named FractionDemo2. c. Write a program named FractionDem03 that includes an array of four Fractions. Prompt the user for values for each. Display every possible combination of addition results and every possible combination of multiplication results for each Fraction pair (that is, each type will have 16 results).
Java Question - Using the bottom code, create another class named "DigitalBook" as a subclass of the given "Book" class. Then, Make sure that the "DigitalBook" class contains two constructors: (1) one is the default constructor that takes no parameter, and (2) the other is a parameterized constructor that take 6 parameters. Be sure to use the “super” keyword in the constructors of the "DigitalBook" class. In the “main()” method of the “EX12_1” class, create four instances: “b1”, “b2”, d1”, and “d2”. Let “b1” and “b2” be the instances of the “Book” class, and let the “d1” and “d2” be the instance of the “DigitalBook” class. Be sure to use the specified constructor (as shown in attached picture) to initialize these instances. The Final Output is shown in the attached pictures. Please make sure that no errors show up in the Java Compiler when testing the code. Thank you. Add the following code to the "class Book" code (Below the ___ line). public class EX12_1{public static void…
Java Question - Using the bottom code, create another class named "DigitalBook" as a subclass of the given "Book" class. Then, Make sure that the "DigitalBook" class contains two constructors: (1) one is the default constructor that takes no parameter, and (2) the other is a parameterized constructor that take 6 parameters. Be sure to use the “super” keyword in the constructors of the "DigitalBook" class. In the “main()” method of the “EX12_1” class, create four instances: “b1”, “b2”, d1”, and “d2”. Let “b1” and “b2” be the instances of the “Book” class, and let the “d1” and “d2” be the instance of the “DigitalBook” class. Be sure to use the specified constructor (as shown in attached picture) to initialize these instances. The Final Output is shown in the attached pictures. Add the following code to the "class Book" code (Below the ___ line). public class EX12_1{public static void main(String[] args){/////add your code here}}…
D Create a class Sum with the following fields, constructors and methods:Fields: create two integer fields Constructors:- a no-argument constructor- a constructor with two parameters Methods:- write a getter to return the sum of fields- Create 4 overloaded calculate methods 1. method receives two integer parameters and returns the sum 2. method receives four integer parameters and returns the sum 3. method receives two double parameters and returns the sum 4. method receives two String parameters and returns the sum Create a demo class to test the two constructors, all the methods and display the returned values. You can hard code the parameters values. Make sure the four methods created are toverloaded i.e. same method name for all four.
Change the Fraction class so that its instance variables (numerator and denominator) are hidden (i.e. private). Check that the client class (after this change) will now not compile. Why does it not compile? Provide the changes to the Fraction class and the TestFraction class such that the program can work with the private instance variables by implementing appropriate accessor and mutator methods. import java.util.Scanner;//test programpublic class testfraction{public static void main(String[] args) {//create a Scanner objectScanner in = new Scanner(System.in);//create new fractionFraction frac = new Fraction();//declare numerator and denominatorint n=1,d;System.out.print("Enter Fraction's Numerator: ");//input numeratorn = in.nextInt();System.out.print("Enter Fraction's Denominator: ");//input denominatord = in.nextInt();//loop execute until the numerator is negativewhile(n>=0){//call input with n and dfrac.input(n, d);//call displayfrac.display();System.out.print("Enter…
This is the question I am struggling on - Create a class named Horse that contains the following data fields: name - of type String color - of type String birthYear - of type int Include get and set methods for these fields. Next, create a subclass named RaceHorse, which contains an additional field, races (of type int), that holds the number of races in which the horse has competed and additional methods to get and set the new field. This is the code I have but it will not accept it at all - public class DemoHorses { public static void main(String args[]) { Horse horse1 = new Horse(); RaceHorse horse2 = new RaceHorse(); horse1.setName("Old Paint"); horse1.setColor("brown"); horse1.setBirthYear(2009); horse2.setName("Champion"); horse2.setColor("black"); horse2.setBirthYear(2011); horse2.setRaces(4); System.out.println(horse1.getName() + " is " + horse1.getColor() + " and was born in " +…
I need to write a jave program to keep track of a team sport. Write a class, Team.java, that has the following: * two private instance variables: a String named color and an int named score. * a default constructor with no parameters that initializes color to "Red" and score to zero. * a constructor that takes two parameters (one for each instance variable) and sets the values of the instance variables. * a public getter and setter method for each instance variable. * a toString method that returns the color and score in the following format: "Red Team with 0 points."