class Background: public DisplayObject | { public: //constructor Background(const std::string& filename):
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- function removeErrMsgs() { var errMessages = document.getElementsByClassName('msg');for (let msg of errMessages) {msg.innerHTML = "";}}function validateValues() {var toBeReturned = true;removeErrMsgs();var fname = document.getElementById("fname").value;if (fname.length > 30) {document.getElementsByClassName('msg')[0].innerHTML = "First name can not be longer than 30 characters";toBeReturned = false;} var lname = document.getElementById("lname").value;if (lname.length > 30) {document.getElementsByClassName('msg')[1].innerHTML = "Last name can not be longer than 30 characters";toBeReturned = false;} var phone = document.getElementById('num').value;if (phone.length > 8) {document.getElementsByClassName('msg')[2].innerHTML = "Phone number can not be greater than 8 numbers";toBeReturned = false;} var items = document.getElementById('items').value;if (items > 4 || items < 2) {document.getElementsByClassName('msg')[3].innerHTML = "Item numbers should be between 1 and…/ CLASS PROVIDED: IntSet (a container class for a set of// int values)//// CONSTANT// static const int MAX_SIZE = ____// IntSet::MAX_SIZE is the highest # of elements an IntSet// can accommodate.// CONSTRUCTOR// IntSet()// Pre: (none)// Post: The invoking IntSet is initialized to an empty// IntSet (i.e., one containing no relevant elements).// CONSTANT MEMBER FUNCTIONS (ACCESSORS)// int size() const// Pre: (none)// Post: Number of elements in the invoking IntSet is returned.// bool isEmpty() const// Pre: (none)// Post: True is returned if the invoking IntSet has no relevant// relevant elements, otherwise false is returned.// bool contains(int anInt) const// Pre: (none)// Post: true is returned if the invoking IntSet has anInt as an// element, otherwise false is returned.// bool isSubsetOf(const IntSet& otherIntSet) const// Pre: (none)// Post: True is returned if all…Library class: Fields: books as arraylist to store all the books available in the library B3 B1 B2 В4 B5 Constructor: Library() } : No parameterized constructor to create the books object Methods: 1. addBook(Book bookobj): to add a new book to the arraylist; send the book object as a parameter to this method. 2. searchBook(String name): search a book by a given name in the arraylist. if exits print bookX found; otherwise print not found!!! 3. RemoveBook(String name): to delete a book object from arraylist by a given name: Hint: you need to use iterator class and remove method. Book class: Fileds: bookld, bookname. Constructor: two parameterized constructor that accepts name a parameter Book(int ID, String name) ..... Methods: 1. Accessor method to return the name of the book 2. Mutator method to change the id of the book. Use this Main method: in your program: public static void main(String args[]) { Library lib=new Library(); lib.addBook(new Book("b1")); lib.addBook(new Book("b2"));…
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- PyCharm Programming! A Game object knows its name and the number of avators is currently has. It is initialized without Avatars objects. It has a method startGame, which initializes an internal empty list of Avator objects. It has a method to add one Avator object at a time to the Game. It also has a method to remove an Avatar object by the Avatar’s name. A Game object also has a method to animate all its current Avatar objects. Furthermore, it has a method to stopGame, which destroys all current Avator objects in its internal list. The Avatar class creates simple human-type Avatars, which have attributes such as name, hair color, height, superpower. An Avatar object can change its hair color and superpower. It also has a method that “animates” the avatar. The animate() method should simply be a print message such as “Hello! I am …! I have…. hair and my super power is….!”, using the Avatar’s object variables. In main program, create 3 different Avatar objects that resemble 3…// Rectanlge.cppusing namespace std;class Rectangle{ public: // Declare public methods here private: // Create length and width here}; void Rectangle::setLength(double len){ // Write setLength here}void Rectangle::setWidth(double wid){ // write setWidth here}double Rectangle::getLength(){ // write getLength here}double Rectangle::getWidth(){ // write getWidth here}double Rectangle::calculateArea(){ // write calculateArea here}double Rectangle::calculatePerimeter(){ // write calculatePerimeter here} // This program uses the programmer-defined Rectangle class. #include "Rectangle.cpp"#include <iostream>using namespace std; int main(){ // Create Rectangle objects here // Set the lengths and widths here // Print the areas and perimeters here return 0;}package assignment; public class Circle2D2 { //data fields specifying the center of the circle private double x, y; //data field radius private double radius; //default circle with (0, 0) for (x, y) and 1 for radius Circle2D2() { this(0, 0, 1); } //circle with the specified x, y, and radius Circle2D2(double x, double y, double radius) { this.x = x; this.y = y; this.radius = radius; } //return x public double getX() { return x; } //return y public double getY() { return y; } //return radius public double getRadius() { return radius; } //return the area of the circle public double getArea() { return Math.PI * Math.pow(radius, 2); } //return the perimeter of the circle public double getPerimeter() { return 2 * Math.PI * radius; } //return true if the specified point (x, y) is inside this circle public boolean contains(double x, double y) { return Math.sqrt(Math.pow(x - this.x, 2) + Math.pow(y - this.y, 2)) < radius; } //return true if…