Programming Assignment #3
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The Dating Game Program
Description
You are to write a program that determines the day of the week for New Year's Day in the year 3000. To do this, you must create your own date class (MyDate) and use the following interface and main program:
/**
Interface for Date objects to be used by the Year3000 driver program.
*/
public interface DateInterface
{
/** @return the day of the month (1-31) */
publicintgetDay();
/** @return the day of the week (0-6) */
publicintgetDow();
/** @return the month of the year (1-12) */
publicintgetMonth();
/** @return the year (four digits) */
publicintgetYear();
/** sets the date
@param m the month of the year (1-12)
@param d the day of the mongth (1-31)
@param y the year (four digits)
@paramdow the day of the week (0-6) */
public void set(int m, int d, int y, intdow);
/** moves the date forward by exactly one day */
public void tomorrow();
/** @return the date as a String in the format "Monday March 18, 2002" */
public String toString();
/** Moves the date backward by exactly one day. */
public void yesterday();
/** sets the date to today;
make this empty {} unless you do the extra credit. */
public void today();
}
import java.io.*;
/**
Driver class for The Dating Game programming assignment.
*/
public class Year3000
{
public static void main(String [] args) throws IOException
{
DateInterface d = new MyDate();
d.set(1,29,2006,0); // sets the date to Sunday, January 29th, 2006
while(d.getYear()<3000)
{
d.tomorrow();
}
// at this point, d represents January 1, 3000
System.out.println(d);
}
}
MCIS 503 Programming Assignment #3 Page 2 of 2
When the program is compiled and run, it should use your MyDate class to correctly predict the day of the week for January 1st, 3000. Note that we are using the integers 0-6 for the days of the week, with 0 representing Sunday, 1 for Monday, etc.
Additional Requirements
• Implement a yesterday() function which moves the date one day backwards. Modify your main program to print the date, including the day of the week, for January 1st, 1800. (Hint: back up to December 31st, 1799, and then call tomorrow() once.)
• Using UML, create a high level design (a.k.a. architecture) of your program before implementation. Include your design (architecture) as an appendix to your Word document submission. You are required to include a simple use case diagram, class diagram and sequence diagram for at least one method.
Extra Credit (up to 5 points)
• [5 points] Using the built-in Date class from Java, have your constructor automatically initialize the date to today. Also, add a today() function to your class to set the date to today. Modify the main program to print today's date using your class.
Hand In
In a single MS Word document with the following three clearly defined sections:
1. Listing (print-out) of your program source code (with comments and headers)
2. Screen captures of sample run outputs (at least 3 runs/scenarios)
3. High level design using UML notation
The filename must be in the following format:
Assignment3_Lastname-Firstname.doc or docx
Please enter the following in the subject line of your email submission:
Assignment3_Lastname-Firstname
Notes
• Don't forget to include comments (javadoccompatible), and remember to indent properly.
• Include pre- and post-conditions for your functions/methods. (That is, the comments should state what the function does, and what it needs to do it.)
• For simplicity, you can pretend all months have 30 days and that there are no leap years for early versions of your program. Add the actual month lengths and leap year information later.
• Aleap year is a year when February has 29 days. A year is a leap year if the year is divisible by 4, but not by 100, or if it is divisible by 100, it must also be divisible by 400. So 1900 was not a leap year, but 2000 was.
• Your tomorrow() and yesterday() functions should fit on one page or less. If they are bigger than that, use some helper functions to break them down.
• Utilize the submission template provided in the course module.