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- 8. Circle ClassWrite a Circle class that has the following member variables:• radius: a double• pi: a double initialized with the value 3.14159The class should have the following member functions:• Default Constructor. A default constructor that sets radius to 0.0.• Constructor. Accepts the radius of the circle as an argument.• setRadius. A mutator function for the radius variable.• getRadius. An accessor function for the radius variable.• getArea. Returns the area of the circle, which is calculated as area = pi * radius * radius• getDiameter. Returns the diameter of the circle, which is calculated as diameter = radius * 2• getCircumference. Returns the circumference of the circle, which is calculated as circumference = 2 * pi * radiusWrite a program that demonstrates the Circle class by asking the user for the circle’s radius, creating a Circle object, and then reporting the circle’s area, diameter, and circumference.…A class is made abstract by declaring that class virtual. T/FActivity - Abstract Class An English teacher wants to find assessment mark of all the students in his course. Write a java program to find assessment mark of the students using following instructions. Save the project/file as StudentAbstract. A) Abstract Class name: Assessment Abstract Member Method: - to calculate and return total score totalScore() B) Class name: English extends Assessment Member variables: QuizMark, PracticeTest, ListeningMark Member Method : - Constructor to initialize member variables - to calculate and return total score totalScore QuizMark + PracticeTest*0.25 + %3D ListeningMark/2 C) Controlling class : StudentAbstract - To create an object of English class - To print totalScore of the English
- 1. Employee and ProductionWorker Classes Write an Employee class that keeps data attributes for the following pieces of information: Employee name Employee number Next, write a class named ProductionWorker that is a subclass of the Employee class. The ProductionWorker class should keep data attributes for the following information: Shift number (an integer, such as 1, 2, or 3) Hourly pay rate The workday is divided into two shifts: day and night. The shift attribute will hold an integer value representing the shift that the employee works. The day shift is shift 1 and the night shift is shift 2. Write the appropriate accessor and mutator methods for each class. Once you have written the classes, write a program that creates an object of the ProductionWorker class and prompts the user to enter data for each of the object’s data attributes. Store the data in the object, then use the object’s accessor methods to retrieve it and display it on the screen. 2. ShiftSupervisor Class In a…Define a class called student that has thefollowing data members: - int student number- string student name- double student averageThe following member functions:- Constructor that initialize the datamembers with default values. - set and getfunctions for each data member- Print function to print the values of data members.Parent Class: Food Write a parent class called Food. A food is described by a name, the number of grams of sugar (as a whole number), and the number of grams of sodium (as a whole number). Core Class Components For the Food class, write: the complete class header the instance data variables a constructor that sets the instance data variables based on parameters getters and setters; use validity checking on the parameters where appropriate a toString method that returns a text representation of a Food object that includes all three characteristics of the food Class-Specific Method Write a method that calculates what percent of the daily recommended amount of sugar is contained in a food. The daily recommended amount might change, so the method takes in the daily allowance and then calculates the percentage. For example, let's say a food had 6 grams of sugar. If the daily allowance was 24 grams, the percent would be 0.25. For that same food, if the daily allowance was 36 grams, the…
- employee and production worker classes write an employee class that keeps data attributes for the following pieces of information: • employee name • employee number next, write a class named productionworker that is a subclass of the employee class. the productionworker class should keep data attributes for the following information: • shift number (an integer, such as 1, 2, or 3) • hourly pay rate the workday is divided into two shifts: day and night. the shift attribute will hold an integer value representing the shift that the employee works. the day shift is shift 1 and the night shift is shift 2. write the appropriate accessor and mutator methods for each class. once you have written the classes, write a program that creates an object of the productionworker class and prompts the user to enter data for each of the object’s data attributes. store the data in the object, then use the object’s accessor methods to retrieve it and display it on the screen. satak overfallowConsider the following class: 1.Write its default constructor 2.Write a code to declare an object from this class using the default constructor public class Dog { String name; String color; void barking() { } void hungry() { } void sleeping() { } }public class FoodItem { private String name; private double fat; private double carbs; private double protein; // TODO: Define default constructor // TODO: Define second constructor with parameters to initialize private fields (name, fat, carbs, protein) public String getName() { return name; } public double getFat() { return fat; } public double getCarbs() { return carbs; } public double getProtein() { return protein; } public double getCalories(double numServings) { // Calorie formula double calories = ((fat * 9) + (carbs * 4) + (protein * 4)) * numServings; return calories; } public void printInfo() { System.out.println("Nutritional information per serving of " + name + ":"); System.out.printf(" Fat: %.2f g\n", fat); System.out.printf(" Carbohydrates: %.2f g\n", carbs); System.out.printf(" Protein: %.2f g\n", protein); }} import java.util.Scanner; public class NutritionalInfo {…
- 15. Suppose the class Employee is declared as follows: public class Employee { private String name; private double baseSalary: public void setName(String newName) {...} public void setBasSalary(double newSalary){...} public String getName() {...} public double getSalary({...} } a)Declare a class Manager that inherits from the class Employee and adds an instance variable bonus for storing a salary bonus. Omit constructors and methods. ANS: b) Which instance variables does the Manager class have? c) In the manager class, provide the method overrides the getSalary method from the class Employee so that it returns the sum of the salary and the bonus d) Based on the above question, which methods does the manager class inherit? e) In the manager class, override the getName method so that managers have a before their name (such as *John Smith).Child Class: Vegetable Write a child class called Vegetable. A vegetable is described by a name, the number of grams of sugar (as a whole number), the number of grams of sodium (as a whole number), and whether or not the vegetable is a starch. Core Class Components For the Vegetable class, write: the complete class header the instance data variables a constructor that sets the instance data variables based on parameters getters and setters; use instance data variables where appropriate a toString method that returns a text representation of a Vegetable object that includes all four characteristics of the vegetableJavaPolymorphism : Write a driver program that uses a AECar reference variable to point to three different types of classes, showing that inheritance is one mechanism for using polymorphism.