is needed to create a new instance of the class? O A field O An instance attribute OA constructor A superclass O A private attribute
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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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- 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 baseCreates a class Student with 3 attributes: name, id and level. a. Add a constructor able to create a Student; b. Add the methods getId and getLevel; c. Add the method display able to display the attributes,Please complete the following tasks: Write a class “Actor” that contains two attributes with the appropriate level of visibility explicitly defined. “Name” which is a String, Private, “NumberofAwards” which is an integer, private Write a default Constructor for this class that initializes the name to “Bob Smith” , and the number of awards to 0. Write an overload the constructor for this class that accepts actor’s name as a parameter Write accessor methods for each of the attributes. Write a method “winsAnOscar” that increases the number of awards by one and prints “The crowd applauds for <actor’s name>!” Be sure to use accessors where appropriate. Make sure your header is complete, with the appropriate level of visibility and any required keywords.
- Which of the following statement is not true? An anonymous inner class is compiled into a class named OuterClassName$InnerClassName.class An anonymous inner class must always extend a superclass or implement an interface, but it cannot have an explicit extends or implements clause. An anonymous inner class always uses the no-arg constructor from its superclass to create an instance. If an anonymous inner class implements an interface, the constructor is Object(). An anonymous inner class must implement all the abstract methods in the superclass or in the interface.Creates a class Student with 3 attributes: name, id and level. a. Add a constructor able to create a Student; b. Add the methods getId and getName; c. Add the method display able to display the attributes,Is there a different way of doing this problem? Question: Create a class AccessPoint with the following attributes: x - a double representing the x coordinate y - a double representing the y coordinate range - an integer representing the coverage radius status - On or Off Add constructors. The default constructor should create an access point object at position (0.0, 0.0), coverage radius 0, and Off. Add accessor and mutator functions: getX, getY, getRange, getStatus, setX, setY, setRange and setStatus. Also, add a set function that sets the location coordinates and the range. Add the following member functions: move and coverageArea. Add a function overlap that checks if two access points overlap their coverage and returns true if they overlap. Add a function signalStrength that returns the wireless signal strength as a percentage. The signal strength decreases as one moves away from the access point location. Test your class by writing a main function that creates five access…
- User: Make a class called User. Create two attributes called first_name and last_name,and then create several other attributes that are typically stored in a user profile. Makea method called desctibe_user() that prints a summary of the user's information. Makeanother method called greet_user() that prints a personalized greeting to the user.Then - Create several instances representing different users, and call both methods for each user. Admin: Write a class called Admin that inherits from the User class. Add an attribute,privileges, that stores a list of strings like "can add post”, "can delete post”, "can banuser”, and so on. Write a method called show_privileges() that lists the administrator'sset of privileges. Then - Create an instance of Admin, and call your method.Modified Circle class and test file: Add a new attribute for color (or any other new attribute) Add get/set methods for this new instance variable, including data validation in set method (assuming background is black, i.e. circle color can't be black, reset to any non-black color if black is entered ). Add a new constructor to pass the color attribute as an argument. Add an instance method to display all properties of a Circle object. Create 2 objects using different constructors in test file, with invalid data. Use this test java file test java file: class CircleTest{ public static void main(String[] args){ int num = 10; Circle c1 = new Circle(0.001); Circle c2 = new Circle("black", -9); c1.display(); c2.display(); c1.setRadius( -1); c1.setColor("black"); c1.display(); }}An aggregate object refers to an instance of a class that ....... (FILL IN THE GAP ) A contains attributes B contains private attributes C contains static methods D contains private methods E contains other objects
- Which one is true? A) An inner class can be declared public or private subject to the same visibility rules applied to a member of the class. B)An inner class can be declared static. A static inner class can be accessed using the outer class name. A static inner class cannot access non-static members of the outer class. C)An inner class supports the work of its containing outer class and is compiled into a class named OuterClassName$InnerClassName.class. D)Inner classes can make programs simple and concise.1. Create 2 interfaces: BankInterface and PetInterface. BankInterface contains only 1 abstract method: accountType() which does not return anything and takes 1 String argument: accType. PetInterface contains only 1 abstract method: petType() which does not return anything and takes 1 String argument petType. 2. Create an abstract class named Student. This class contains 2 instance variables, 1 constructor, and 2 abstract methods. a. Instance variables: stId and stName (Use must use appropriate data type.) b. A 2-argument constructor that will be called from its subclass (the concrete class) to load 2 instance variables of this level during the creation of an object in its subclass. c. 2 abstract methods: getStId and getStName.. Each of these methods, when sub classed into concrete ones, should return the respective values of the instance variables stId and stName. d. At this level you should do something to get the object state at this level. 3. Create a concrete class named…1. Create 2 interfaces: BankInterface and PetInterface. BankInterface contains only 1 abstract method: accountType() which does not return anything and takes 1 String argument: accType. PetInterface contains only 1 abstract method: petType() which does not return anything and takes 1 String argument petType. 2. Create an abstract class named Student. This class contains 2 instance variables, 1 constructor, and 2 abstract methods. a. Instance variables: stId and stName (Use must use appropriate data type.) b. A 2-argument constructor that will be called from its subclass (the concrete class) to load 2 instance variables of this level during the creation of an object in its subclass. c. 2 abstract methods: getStId and getStName.. Each of these methods, when sub classed into concrete ones, should return the respective values of the instance variables stId and stName. d. At this level you should do something to get the object state at this level. 3. Create a concrete class named…