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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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:…
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 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;…
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.