When you redefine the __str__ method in a class, the keyword print has different meanings based on what objects are passed through it. What is this an example of? Class Polymorphism Inheritance Encapsulation
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- Assume that you have created a class named MyClass. The header of the MyClass constructor can be ____________. public MyClass() public MyClass (double d) Either of these can be the constructor header. Neither of these can be the constructor header.Create a constructor for the Student class you created. The constructor should initialize each Student’s ID number to 9999, his or her points earned to 12, and credit hours to 3 (resulting in a grade point average of 4.0). Write a program that demonstrates that the constructor works by instantiating an object and displaying the initial values. Save the application as ShowStudent2.java.console application named SalesTransactionDemo that declares several SalesTransaction objects and dispplays their values and their sum. The SalesTransaction class contains fields for a salesperson name, sales amount, and comission rate. Include three constructors for the class. Once constructor accepts values for the name, sales amount, and rate, and when the sales value is set, the constructor computes the commission as sales value time commission rate. The second constructor accepts a name and sales amount, but sets the commission rate to 0. The third constructor accepts a name and sets all other fields to 0. An overloaded + operator add the sales values for two SalesTransaction objects.
- When an object variable is declared, what happens if the programmer did not write a constructor for the class? Group of answer choices It will be a logic error. It will be a syntax error. The compiler automatically creates a simple default constructor. The compiler will ask the user to create one. The compiler will do nothing about it.This has to be done in visual studio, c# windows form application (.net fromework). Question: The application should be able to do the following :• Create a class called Person which contains 4 private fields : Name(string), Surname (string),Course(string), CRNumber(int).• The class must contain 4 public properties which will be used to get and set the values of the private fields.• The class must contain a default constructer. The class must also contain an overloaded constructer which should be able to set the values of each of the private fields.• The class must contain a static ViewInfo method which will be used to display information of a queue of person objects back to the user neatly grouped underneath each other as displayed above.• Once a user clicks on the “Add Person” button then the information in the respective textboxes should be used to create a Person object (using the properties or the overloaded constructor) and add it to a queue which is of type Person. The…java When we create an object of a class, the object's instance variables are automatically initialized with its default values without us writing code in any constructor. Choose one of the options:TrueFalse
- This is the question - Write an application that uses an abstract Insurance class and Health and Life subclasses to display different types of insurance policies and the cost per month. The Insurance class contains a String representing the type of insurance and a double that holds the monthly price. The Insurance class constructor requires a String argument indicating the type of insurance, but the Life and Health class constructors require no arguments. The Insurance class contains a get method for each field; it also contains two abstract methods named setCost() and display(). The Life class setCost() method sets the monthly fee to $36, and the Health class sets the monthly fee to $196. Code I was given - import java.util.*; public class Health extends Insurance { public Health() { // write your code here } public void setCost() { // write your code here } public void display() { // write your code here } } public…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.Car ClassWrite a class named Car that has the following fields:• yearModel. The yearModel field is an int that holds the car’s year model.• make. The make field references a String object that holds the make of the car.• speed. The speed field is an int that holds the car’s current speed. In addition, the class should have the following constructor and other methods.• Constructor. The constructor should accept the car’s year model and make as arguments. These values should be assigned to the object’s yearModel and make fields. The constructor should also assign 0 to the speed field.• Accessors. Appropriate accessor methods should get the values stored in an object’s yearModel, make, and speed fields.• accelerate. The accelerate method should add 5 to the speed field each time it is called.• brake. The brake method should subtract 5 from the speed field each time it is called.Demonstrate the class in a program that creates a Car object, and then calls the accelerate method five…
- (Date Class) Create a class called Date that includes three pieces of information as auto-implemented properties—a month (type int), a day (type int) and a year (type int). Your class should have a constructor that initializes the three automatic properties and assumes that the values provided are correct. Provide a method DisplayDate that displays the month, day and year separated by forward slashes (/). Write a test app named DateTest that demonstrates class Date’s capabilities.A class may only have one default _________ and one _________.Class members are private by default and it's not possible to access them outside the class. True False
