Overriding is useful when a method has the same signature and type as a method in the parent class. a local variable has the same name as an instance variable. O you want to change the return type of a method. O a method has the same signature as another method in the same class.
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OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
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- IN JAVA When is is necessary to create an object to call a method? A. When the method is an instance method. B. When the method has a return value. C. When the method is void. D. When the method is a static method.When you make a class method const, it means ____. Multiple answers: Multiple answers are accepted for this question Select one or more answers. a the class can have two overloaded methods with seemingly identical heads: one const and the other not b the method won't be allowed to change the data of any class object c any time methods are called using a constant object, the const version is used — or a compile-time error results if no const version exists d the calling object must be a constant object e the calling object will be treated as a constant object during the call(1) Add an __init__ method to the Widget class below. Each object of type Widget should have an instance variable called name and an instance variable called cost that represents a cost in dollars; those values are passed in when an object of type Widget is initialized. (2) Add a method to class Widget called is_cheap that returns True if the cost is less than $10, and False otherwise. (3) Add proper doctrings along with two examples for each method. You may use the Sample Usage code given below in your work.
- Given this class, please add the requested methods in the designated spaces provided. Instance methods: a) Write two constructors that will initialize the instance variables for a Student instance as follows: 1) Write a constructor that takes in three parameters – an int, a String, and a double. The constructor will assign them to the ID, name, and GPA instance variables respectively. 2) Write a no-argument (zero-parameter) constructor that will set the ID to - 1, the name to “No name assigned”, and the GPA to –1.0. b) Write an accessor method for the name variable. c) Write a mutator method for the GPA variable. d) Write a toString() method that will display all three instance variables on a single line, with a | (vertical bar) character between each one. e) Write an equals() method that returns true only if all three instance variables are equal. public class Student { // declare instance variables here private int ID; private String name; private double GPA;5) In a class definition, what type of method uses the values of the object's instance variables without changing them? a. constructor b. accessor C. instance d. mutator 17) What is the value of r after the following code executes? mySet = (2, 3, 5, 7, 11) yourSet = {5, 7, 2, 11, 3) r = yourSet == mySet a. (5, 7, 2, 11, 3} b. {2, 3, 5, 7, 11} c. True d. error 8) Assume x is equal to O and y is equal to 5. Which comparison operation does not return False? a. x == y or y b. y 5 and y C. (x > y) and x d. x > 0 and NoneCreate a PhoneListing class that uses the Name class for one of its instance variables. Remember the instance data in the Name class is private to the class and must be accessed through its methods.Add additional instance variables to the PhoneListing class for the phone number. The phone number should be broken down into three parts, area code, city code, and local code.Create all appropriate methods for the new class, including the following three methods: equals(PhoneListing):boolean, an equality of state method that returns true if the objects contain the same name and phone number. compareTo(PhoneListing):int, a comparison method that returns -1 if the calling PhoneListing object should precede the argument PhoneListing object, 1 if the calling PhoneListing object should come after the argument PhoneListing object, and a 0 if they are equal. Use last, first, middle, phone number as the ordering values. example:Adams, Alex, Henry, (609)473-2101 Adams, George, Henry, (509)373-1101…
- tri1 and tri2 are instances of the Triangle class. Attributes height and base of both tri1 and tri2 are read from input. In the Triangle class, define instance method print_info() with self as the parameter to output the following in one line: 'Height: ' The value of attribute height ', base: ' The value of attribute baseOverloading is achieved when two or more methods in the same class have the sameGiven the class declaration and instance method definitions and based on what you learned about separate compilation, what would be a good name for the header file containing the declaration, and what would be a good name for the source file containing the instance method definitions? // This is the class declaration class Rectangle { public: Rectangle(double width, double height); double get_height() const; double get_width() const; double get_area() const; private: double _width; double _height; }; // This is the instance method definition Rectangle::Rectangle(double width, double height) { _width = width; _height = height; } double Rectangle::get_height() const { return _height; } double Rectangle::get_width() const { return _width; } double Rectangle::get_area() const { return _width * _height; }
- What is the difference between a static (class) method and a method that is called on an instance?Overloading is achieved when two or more methods in the same class have the same: return type parameter type method name method signaturesCreate a class called Student that has 4 instance private variables: • FirstName: of type string. • LastName: of type string. • GPA: of type double. • Year: of type integer. The class should also include the following methods: • A constructor with parameters for instances variables FirstName, LastName, GPA and year. • 4 set methods to update the instance variables. • 4 get methods to get the instance variables values.