Concept explainers
LandTract Class
Make a LandTract class that has two fields: one for the tract’s length and one for the width. The class should have a method that returns the tract’s area, as well as an equals method and a toString method. Demonstrate the class in a
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- Circle ClassWrite a Circle class that has the following fields:• radius: a double• PI: a final double initialized with the value 3.14159The class should have the following methods:• Constructor. Accepts the radius of the circle as an argument.• Constructor. A no-arg constructor that sets the radius field to 0.0.• setRadius. A mutator method for the radius field.• getRadius. An accessor method for the radius field.• area. Returns the area of the circle, which is calculated asarea = PI * radius * radius• diameter. Returns the diameter of the circle, which is calculated asdiameter = radius * 2• circumference. Returns the circumference of the circle, which is calculated ascircumference = 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.arrow_forward2. Car Class Write a class named car that has the following fields: ▪ yearModel. The year Model field is an int that holds the car's year model. ▪ make. The make field is a String object that holds the make of the car, such as "Ford", "Chevrolet", "Honda", etc. ▪ speed. The speed field is an int that holds the car's current speed. In addition, the class should have the following methods. ■ Constructor. The constructor should accept the car's year model and make as arguments. These values should be assigned to the object's year Model and make fields. The constructor should also assign 0 to the speed field.arrow_forward:Define and implement class Employee. This class should contain the following fields: first name, last name, employee id, hourly pay. This class should contain getters and setters for all its attributes. This class also needs at least one constructor. Implement method computePay() in this class. This method should accept an integer number of hours the employee worked as an input argument and return a floating point value indicating the pay the employee earned. If the number of hours is invalid (e.g. a negative number) this method should throw NumberFormatException. If the number of hours is over 40 then this method should throw a custom exception named TooManyHoursWorkedException. Remember that you will have to define your own exception class for this. Save this class and its definition into a file named Employee.java. Define and implement class EmployeeTest.This class should implement main() method. In the body of the main() method you should create an instance of Employee with the…arrow_forward
- public Account (double initialBalance){balance = initialBalance;}public Account () {balance = 0;}public void deposit (double amount){balance += amount; // Balance = balance + amount}public void withdraw (double amount){balance -= amount; // balance = balance - amount}public void close (){balance = 0;}public String toString(){return "balance: " + balance;}} Modify the Account class by adding two instance variables containing the customer's name and the account number. Both will be String objects. Modify the primary constructor for the Account class so that it takes three parameters: the balance, the customer's name, and the account number. Add instance methods named getCustomerName and getAccountNumber that return the customer name and account number.arrow_forwardNutritional information (classes/constructors) PYTHON ONLY Complete the FoodItem class by adding a constructor to initialize a food item. The constructor should initialize the name (a string) to "None" and all other instance attributes to 0.0 by default. If the constructor is called with a food name, grams of fat, grams of carbohydrates, and grams of protein, the constructor should assign each instance attribute with the appropriate parameter value. The given program accepts as input a food item name, fat, carbs, and protein and the number of servings. The program creates a food item using the constructor parameters' default values and a food item using the input values. The program outputs the nutritional information and calories per serving for both food items. Ex: If the input is: M&M's10.034.02.01.0 where M&M's is the food name, 10.0 is the grams of fat, 34.0 is the grams of carbohydrates, 2.0 is the grams of protein, and 1.0 is the number of servings, the output is:…arrow_forwardBuild a class named car. This class is defined as follows: It has the fields: Car ID, Car model , Car make, Car color, Car year. Build a constructor that accepts the five parameters (Car ID, Car model , Car make,Car color, Car year). Override the method toString() to return the string representation of Car ID, Carmodel , Car make, Car color, Car year.arrow_forward
- Assignment 4 - Car Maintenance This assignment will assess your understanding of void and value returning static methods. Your cousin owns an automotive maintenance shop that performs routine maintenance on cars. He has asked you to write a program that will provide a list of services (and their respective prices) to users and allow them to choose any, or all, services they would like and display the final price, including a 28% labor charge, a 9% markup if the car is an import, and an 8% sales tax. Task To accomplish the above, do the following: • Write the two methods outlined below. • Test your program and screenshot your successful test. carMaintenance method This method should accept the make of the car as a parameter (e.g., BMW, Ford, Ferrari, etc.). It should display the services and their prices as follows: Services: Oil Change, Tune up, Brake Job, Transmission Service, respectively: 59.99, 111.99, 189.99, 149.99 These should be stored in parallel arrays. Ask the user to…arrow_forwardJAVA - USING CONSTRUCTORS Create a class named House that includes data fields for the number of occupants and the annual income as well as methods named setOccupants(), setIncome(), getOccupants() and getIncome() that set and return those values respectively. Additionally, create a constructor that requires no arguments and automatically sets the occupants field to 1 and income field to 0. Create an additional overloaded constructor . This constructor receives an integer argument and assigns the value to the occupants field. Create a third overloaded constructor this time, the constructor receives 2 arguments, the values of which are assigned to the occupants and income fields respectively. Create another class named I_house that instantiates the House class and see if the constructors work correctly.arrow_forwardArea of a rectangle = length * width Create a Class that calculates and prints out the area of a rectangle. Then write code that creates an object of this Class in which given the length and width, it calculates and prints out the area of a rectangle. Your output should look like this: Area of rectangle: 87arrow_forward
- Public Class Circle Private Rad As Double Cosnt PI As Double = 3.14159 Property Radius() As Double Get Return Rad End Get Set(ByVal Value As Double) Rad = Value End Set End Property ReadOnly Property Circumference() As Double Get Return 2 * PI * Rad End Get End Property ReadOnly Property Area() As Double Get Return PI * Rad * Rad End Get End Property End Module In this exercise, assume that a circle object name one Circle has been created in a program that uses the circle class and that the radius of a Circle is 4.5 Write the Visual Basic code that will assign the circumference of oneCircle to a Double variable named circumference1.arrow_forwardPublic Class Circle Private Rad As Double Cosnt PI As Double = 3.14159 Property Radius() As Double Get Return Rad End Get Set(ByVal Value As Double) Rad = Value End Set End Property ReadOnly Property Circumference() As Double Get Return 2 * PI * Rad End Get End Property ReadOnly Property Area() As Double Get Return PI * Rad * Rad End Get End Property End Module In this exercise, assume that a circle object name one Circle has been created in a program that uses the circle class and that the radius of a Circle is 4.5 What is the value stored in the text box named txtCircumference when the following line of Visual Basic code executes? txtCircumference.Text = oneCircle.Circumference Assuming theris a text box named txtArea, is the following a legeal Visual Basic statement? Why or why not? txtArea.Tet = Area() Consider the…arrow_forwardA class named boss has been defined as follows:public class Best {private int aNum; private int bNum; public Boss() { }public void setNums(int x, int y){aNum= x;bNum= y;}}Given the values of aNum and bNum are 13 and 72, write the toString() method for this class will display the class fields in the format below.The values of aNum= 13 and bNum= 72arrow_forward
- EBK JAVA PROGRAMMINGComputer ScienceISBN:9781305480537Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENTEBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT