How many properties (attributes) does the following class have? E widget weight: double - color : int + Widget(): + Widget (double, int) : + getweight(): double + getColor() : int + setWeight (double): void + setColor (int) : void + displayInfo(): void.

How many properties (attributes) does the following class have? E widget weight: double - color : int + Widget(): + Widget (double, int) : + getweight(): double + getColor() : int + setWeight (double): void + setColor (int) : void + displayInfo(): void.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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one class - one Test class to create objects and test
Write a class for the following object. Fraction - an object that represents parts of a whole number. A fraction is created by supplying a numerator and a denominator. Instance related actions 1. add - mutates this fraction by adding the other fraction value 2. subtract - mutates this fraction by subtracting the other fraction value 3. multiply - mutates this fraction by multiplying with the other fraction value 4. divide - mutates this fraction by dividing by the other fraction value 5. tostring - represents the fraction in a form of 'numerator/denominator" 6. compareTo - returns the following values 1. O when this fraction is equal with the other fraction 2. 1 when this fraction is greater than the other fraction 3. -1 when this fraction is less than the other fraction Example fraction1 = 1/2 fraction2 = 3/4 When fraction1.add(fraction2] is called, it will make the value of fraction 1 as 5/4. When fraction1.subtract(fraction2) is called, it will make the value of fraction 1 as -1/4.…
#Testing Please test my code and see if it meet the follwing needs: The class should implement the Comparable interface. Circle one is less than Circle two if the radius of Circle one is less than the radius of Circle two. The two Circles are equal if they have the same radius. Circle one is larger than Circle two if its radius is larger. If circle One.compareTo circle Two <> 0 The Test Class displays a menu that allows the user to: Enter a Circle (the user only needs to enter the radius). Print all Circles (print the toString for each Circle in the ArrayList). Quit To adda a circle Cases: The ArrayList is empty The new circle is less than the first circle, add it at the beginning. The circle is greater than the last circle, add it at the end The new circle belongs somewhere in the middle. import java.lang.Math;public class Circle implements Comparable<Circle> {private double radius;public Circle(double radius) {this.radius = radius;}public double findArea()…
Objectives: Use Javadocs to document a class and methods Design and write a Java class Use fields (instance variables) Write multiple constructors Write accessor methods Write mutator methods Use the this keyword Use string concatenation Round floating point numbers (using Math.round()) Use a Scanner object Description ProduceItem class For this project, you get to design and write a ProduceItem class that stores a description, cost and weight as fields. Include both a constructor without any parameters and one with parameters for the description (String), cost (double) and weight (double) (in that order). For the constructor without parameters, set the description to an empty string, the cost to 0.0 and the weight to 0.0. Include appropriate accessor and mutator methods (and label them with comments including the terms "accessor" or "mutator"). So that the test cases compile, name the accessor methods: getDescription() getCost() getWeight() Additionally, name the mutator methods:…
Part I Create a Ticket class. The design is up to you. Write the necessary methods. Part II Create a MovieTicket class that inherits from Ticket class. The design is up to you. Write the necessary methods. Part III Create a Theater class. The design is up to you. Write the necessary methods.
A class which is called Book consists of: Instance Variable bTitle (String): book title authors [] (String): names of authors bType (String): type of book p_year (int): year of publishing copy (int): count of available copy. Methods laonBook(): loan a copy of book retBook(): retrieve the book. checkCopy(): check number of book. displaylnfo: display book information (book title, authors, copy). Main Class which is called Library that have a screen contains a selective options (1...6), to perfume below tasks: 1- Adding books (allows to add n books accounts). 2- Loan Book 3- Retrieve Book 4- Check Copy: check the copies of books. 5- Display book information in the library. 6- Exit. Notes: A. Loan a book requires check the book copy, in case no available copy the program must show a message. B. Displaying books information in the library as per below example: S. Book Title Authors Ali Mohamed, Ahmed Ali Saad Mustafa Copies 20 1 Java OOP Probability 100
fix the python code so the first image looks like the second one(images attached) class PriceChecker(): # Constructor def __init__(self): self.levelsList = [] def levelsList(self): return self.__levelsList def levelsList(self, newValue): self.__levelsList = newValue # Class Methods # ============= # Method: Sort and Display the levelsList def displayList(self): print(chr(27) + "[2J") # Clear the screen print("Price Levels In The List") print("========================") # Sort the list in reverse order self.levelsList.sort(reverse=True) # Print the items in the list (Based on the above sort, numbers should appear from large to small.) for item in self.levelsList: print(item,end=" ") # Display the menu and get user input about what methods to execute next def displayMenu(self): min = 0 max = 3 errorMsg = "Please enter…
The class Shapes includes two void methods: calcTriangleArea( ) and calcTrianglePerimeter( ). The calcTriangleArea ( ) method takes two int parameters (base and height), calculates the area of a triangle, and assigns the value to a private instance variable (area). The calcTrianglePerimeter( ) method takes three int parameters (lengthSide1, lengthSide2, and lengthSide3), calculates the perimeter of a triangle, and assigns the value to a private instance variable (perimeter). The Shapes class also includes two getter methods, which return the calculated values. The Shapes class implements the Calculatable interface.Write the Shapes class and the Calculatable interface.
The Factory method design pattern is advantageous since it enables dynamically creating new objects of a certain kind. True Untrue
public class DesertEvent { private static int eventCount = 0; private String barCode; private String location; private String eventName; private String eventType; private int quantity; private int capacity; private int seatsTaken; public DesertEvent(String eventName, String eventType) { this(eventName, eventType, 0); calcMaximumSeats(eventType); generateBarCode(); } public DesertEvent(String eventName, String eventType, int capacity) { this.eventName = eventName; this.eventType = eventType; this.capacity = capacity; generateBarCode(); eventCount++; } public String getBarCode() { return barCode; } public String getLocation() { return location; } public String getEventName() { return eventName; } public String getEventType() { return eventType; } public int getQuantity() { return quantity; } public void setQuantity(int quantity) { this.quantity = quantity; } public int getCapacity() { return capacity; } public void setCapacity(int capacity) { this.capacity = capacity;…
Create a product object/json object. Sample json object. { "product": [{ "name": "iphone 11", "brand": "apple", "description": "iphone 11", "price": "280" }, { "name": "iphone 11", "brand": "apple", "description": "iphone 11", "price": "280" }, { "name": "iphone 11", "brand": "apple", " description": "iphone 11", "price": "280" } ] } - don’t use jQuery or any library. - don’t use css framework like bootstrap,…
PLEASE ANSWER ALL QUESTIONS ON THE NEXT PAGE: class bookType { public: void setBookTitle(string s); //sets the bookTitle to s void setBookISBN(string ISBN); //sets the private member bookISBN to the parameter void setBookPrice(double cost); //sets the private member bookPrice to cost void setCopiesInStock(int noOfCopies); //sets the private member copiesInStock to noOfCopies void printInfo() const; //prints the bookTitle, bookISBN, the bookPrice and the copiesInStock string getBookISBN() const; //returns the bookISBN double getBookPrice() const; //returns the bookPrice int showQuantityInStock() const; //returns the quantity in stock void updateQuantity(int addBooks); //adds addBooks to the quantityInStock, so that the quantity in stock now has it original // value plus the parameter sent to this function private: string…