How many properties (attributes) does the following class have widget weight : double color : int + Widget (): + Widget (double, int) : + getWeight0 : double + getColor () : int + setweight(double) : void + setColor (int) : void + displayInfo() : void Seloct

How many properties (attributes) does the following class have widget weight : double color : int + Widget (): + Widget (double, int) : + getWeight0 : double + getColor () : int + setweight(double) : void + setColor (int) : void + displayInfo() : void Seloct

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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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.…
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:…
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
The Circle class inherits from the Shape base class. Circle overrides the display() function defined in the Shape base class. Which of the following will call the base class display function from the Circle display function? this->display() Shape::display() display() ::display()
Given the following class: 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 bookName; string…
Q2: Create a book modelDraw a class diagram to depict a book as specified by the following statement: "A book is made up of several parts, each of which is made up of several chapters."Sections are made up of chapters." To begin, concentrate just on classes and associations.Multiplicity should be added to the class diagram you created.Improve the class diagram by adding the following features:• The book has a publisher, a publishing date, and an ISBN number.• A title and a number are included in a part; a title, a number, and an abstract are included in a chapter; and a title, a number, and an abstract are included in a section.Take a look at the refined class diagram. A title and a number characteristic are included in the Part, Chapter, and Section classes. To factor out these two traits, use inheritance.
public class LineDisplay extends Application public void start (Stage primarystage) { Group root = new Group (); Scene scene = new Scene (root, 400, 400, Color.WHITE); horizontalLines (10, 10, 100, 10, 10, 8, root); primarystage.setTitle ("Line Display"); primarystage.setScene (scene); primarystage.show (); public void horizontallines (int x0, int yo, int init_size, int increment, int gap, int count, Group group) { // } } Design method public void horizontallines (int x0, int yo, int init_size, int increment, int gap, int count, Group group) where initial point x0, yo init_size - sizeo of first line increment an amount to add to the size of next line distance among the lines number of lines gap count group - group to add the lines Possible output: Line .
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…
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…
public abstract class Shape { public Shape() { } public abstract double area() ; public String who() { return "Shape" ; } } public class Circle extends Shape { private int radius ; public Circle( int r ) { radius = r ; } @Override public double area() { return Math.PI * radius * radius ; } } public class Square extends Shape { private int _sideLength ; public Square( int sideLength ) { /* TODO question 45 */ } @Override public double area() { return _sideLength * _sideLength ; } } Implement the Square constructor, and make sure it throws an exception when the input parameter is not a valid length. The input parameter must be positive to be considered valid.