15. The Date class as three private integer attributes (day, month, year) A user requests a new Dateobject method public String dayOfWeek() that returns a String with the day of the week for the Dateinstance the method is called on ("Mon", "Tues", "Wed")|A fellow programmer wants to add a private String attribute dayOfWeek to support this request,but I say we don't need the attribute since we can calculate the day of the week from the month, day, yearhttp://en wikipedia org/wiki/Determination_of_the_day of the_week Why is my approach better?

Program Plan: • Create a structure Date o Data members: • Declare an int type variable month to…

Answered: 15. The Date class as three private…

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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Date -day: int -month: int -year: int +Date() +Date(int, int, int) +Date(Date) +getDay(): int +set Day (int): void +get Month(): int +setMonth(int): void +getYear(): int +setYear(int): void +show(): void Employee #employeeId: int #dateEmployed: Date: + Employee() +Employee(int, Date) +Employee (Employee) +getEmployeeId(): int +set EmployeeId(int): void +getDateEmployed(): Date +setDate Employed (Date): void +show(): void Contract Worker -durationOfContract: int +ContractWorker() +ContractWorker(int, Date, int) +ContractWorker (ContractWorker) +getDurationOfContract(): int +setDurationOfContract (int): void +show(): void Manager -department: string +Manager() +Manager(int, Date, string) +Manager (Manager) +getDepartment (): string +setDepartment (string): void +show(): void Using the UML Diagram provided, assuming that all classes have been implemented, write code snippets in C++ or Java to demonstrate sub-type polymorphism using only the classes from the diagram.
public class VisitorPackage{// Declare data fields: an int named travelerID, // a String named destination, and // a double named totalCost.// Your code here... // Implement the default contructor.// Set the value of destination to N/A, and choose an // appropriate value for the other data fields,// Your code here... // Implement the overloaded constructor that passes new// values to all data fields.// Your code here... // Implement method getTotalCost to return the totalCost.// Your code here... // Implement method applyDiscount.//// This method applies a discount off of the total cost// of the tour. The way the discount is applied depends// on the kind of visitor.//// Child discount: the unit discount is subtracted ONCE// from the total cost of the tour.// Senior discount: the unit discount is subtracted TWICE// from the total cost of the tour.// Parameters:// - a char to indicate the kind of visitor// ('c' for child, 's' for senior)// - a double that indicates the amount of the…
Write a code for a banking program.a) In this question, first, you need to create a Customer class, this class should have:• 2 private attributes: name (String) and balance (double)• Parametrized constructor to initialize the attributes• Methods:i. public String toString() that gives back the name and balanceii. public void addPercentage; this method will take a percentage value andadd it to the balanceb) Second, you will create a driver class and ask the user to enter 6 customers’ informationand then you will create an array of Customer objects.c) Then you use this array used for various operations as shown in the output.• Using the array of customer objects, you need to search for all customers whohave less than $150• Using the array of customer objects, you need to get the average balance of thebalances in this array• Using the array of customer objects, you need to get the customer with thehighest balance and lowest balance• Using the array of customer objects, you need to show all…
Written in Python It should have an init method that takes two values and uses them to initialize the data members. It should have a get_age method. Docstrings for modules, functions, classes, and methods
CSC 1302: PRINCIPLES OF COMPUTER SCIENCE II Lab 6 How to Submit Please submit your answers to the lab instructor once you have completed. Failure to submit will result in a ZERO FOR THIS LAB. NO EXCEPTIONS. The class diagram with four classes Student, Graduate, Undergraduate, and Exchange is given. Write the classes as described in the class diagram. The fields and methods for each class is given below. Student Exchange Graduate Undergraduate Student: Fields: major (String) gpa (double) creditHours (int) Methods: getGpa: returns gpa getYear: returns “freshman”, “sophomore”, “junior” or “senior” as determined by earned credit hours: Freshman: Less than 32 credit hours Sophomore: At least 32 credit hours but less than 64 credit hours Junior: At least credit hours 64 but less than 96 credit hours Senior: At least 96 credit hours Graduate:…
Ag 1- Random Prime Generator Add a new method to the Primes class called genRandPrime. It should take as input two int values: 1owerBound and upperBound. It should return a random prime number in between TowerBound (inclusive) and upperBound (exclusive) values. Test the functionality inside the main method. Implementation steps: a) Start by adding the method header. Remember to start with public static keywords, then the return type, method name, formal parameter list in parenthesis, and open brace. The return type will be int. We will have two formal parameters, so separate those by a comma. b) Now, add the method body code that generates a random prime number in the specified range. The simplest way to do this is to just keep trying different random numbers in the range, until we get one that is a prime. So, generate a random int using: int randNum = lowerBound + gen.nextInt(upperBound); Then enter put a while loop that will keep going while randNum is not a prime number - you can…
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