2A. Create a Date class with three integer instance variables named day, month, year. It has a constructor with three parameters for initializing the instance variables, and it has one method named daysSinceJan1(). It computes and returns the number of days since January1ofthe same year, including January 1 and the day in the Date object. For example, if day is a Date object with day = 1, month = 3, and year = 2000, then the call date.daysSinceJan1( ) should return 61 since there are 61 days between the dates of January 1, 2000, and March 1, 2000, including January1 and March 1. Include a DateDemo class that tests the Date class. Don't forget leap years. %3D %3D

2A. Create a Date class with three integer instance variables named day, month, year. It has a constructor with three parameters for initializing the instance variables, and it has one method named daysSinceJan1(). It computes and returns the number of days since January1ofthe same year, including January 1 and the day in the Date object. For example, if day is a Date object with day = 1, month = 3, and year = 2000, then the call date.daysSinceJan1( ) should return 61 since there are 61 days between the dates of January 1, 2000, and March 1, 2000, including January1 and March 1. Include a DateDemo class that tests the Date class. Don't forget leap years. %3D %3D

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

See similar textbooks

Similar questions

2. Design a class named Rectangle to represent a rectangle. The class contains: Two double instance vaiables named width and height that specify the width and height of the rectangle. The default values are 1 for both width and height. A no-arg constructor that creates a default rectangle. A constructor that creates a rectangle with the specified width and height. A method named getArea() that returns the area of this rectangle. Write a test program that creates two Rectangle objects-one with width 4 and height 40 and the other with width 3.5 and height 35.9. Display the width, height, area of each rectangle in this order. with java
What is the solution for this question (using java language)
The Rockford Daily Clarion wants you to design a class named Issue. Fields include the issue number, the total number of advertisements sold in each issue, and total advertising revenue. Include get and set statements for each field. Include a static method that displays the newspaper's motto (Everything you need to know) Include three overloaded contractors as follows. A default constructor that sets the issue number to 1 and the other fields to 0. A constructor that allows you to pass values for all three fields. A constructor that allows you to pass an issue number and a number of advertisements sold but sets the advertising revenue at 50$ per ad.
Number 13
In Python 3, write a program with classes to keep track of phones. Here are the requirements: Create a new class called Phone. The Phone class should have a class attribute for the owner's name. Since all phones have a manufacturer and a model number, your class should take the manufacturer and model number from the constructor and assign them to instance attributes. Your Phone constructor should be able to take the parameters. Override the print method for Phone to output a human-friendly version of the information. Your code should prompt the user for an owner name and then start prompting for the manufacturers and models for all phones for that user until the user enters a 'q' or 'Q'. After the entry print out a list of all the phones.
Write a class 'Cylinder' that has two fields: height and radius. The class should have only one parameterized constructor function to initialize these fields. The class should also have a method 'getVolume()' to calculate the volume of this cylinder. Now, create any 2 objects of this class with arbitrary values and show their volumes.
Write a program that test methods in the class. • Hint: the employee deserved retirement if he has year of Service >25 or his age >=65. 5. Design a class named MyInteger. The class contains: • An int data field named value(int) Methods isEven() and respectively. Write a program that test methods in the class. isOdd() that return true if the value is even or odd.