Andres Soto

Yes yes! But that's the problem I don't know how to keep track of that. How would I go about doing this? I have to increment the start date? How do I do this? Please, I really need the help. This is the last step in my assignment. I already completed the tester class and everything I just need to to fix/complete the loop. Thank you

I changed it to

do { start.next(); } while(start.getMonth()<end.getMonth() && start.getDay() < end.getDay() && start.getYear()<end.getYear() ); return i dont know what to return here

I want to return the amount of times that startnext occurred since thats equal to the amount od days between the two dates right?

Sorry. I just changed it.

Can you help me fix this loop please?
// TO DO: write body of this method here /** * Computes and returns the number of days between two dates, counting the * end date but not the start date. E.g., the number of days between * 11/1/2012 and 11/5/2012 is 4, not 5. * * Precondition: The start date must occur on or before the end date. * * @param start the earlier of the two dates * @param end the later of the two dates * * @return the number of days elapsed between the start date and the end * date */ public int countingTheDays(Date start, Date end) { int count = start.getDay(); do{ count ++ ; } while(start.getMonth()<end.getMonth() && start.getDay() < end.getDay()); return count ; } }

These are the methods

Accessor Methods

d1.getMonth() // returns the month as int 1..12
d1.getDay() // returns the day of the month, as an int
d1.getYear() // returns the year

d1.getMonthName() // returns the month as a String (e.g. “March") d1.getDayOfWeek() // returns the day of the week as a string (e.g.,
// “Friday”)

d1.equals(d2) // returns true if d1 is the same date as d2
// otherwise, returns false

d1.getShortDate() // returns the date as mm/dd/yyyy
d1.getMediumDate() // returns the date in the form of
//“November 2, 2010”
d1.getLongDate() // returns the date in the form of
// “Monday, November 2nd, 2010”

Mutator Methods

Date d = new Date(1,1,2012) ; // d is January 1, 2012 (a leap year)

d.next() ; // d is January 2, 2012
d.previous() ; // d is January 1, 2012
d.add(31) ; // d is February 1, 2012
d.subtract(32) ; // d is December 31, 2011
d.next() ; // d is January 1, 2012

d = new Date(3,1,2012) ; // d is March 1, 2012
d.previous() ; // d is now February 29, 2012

I think I see the logic error with my code. It will be infinite right? How can I fix it though?

Thank you aj! There was a logic error located in the loop but i fixed and got iy to run! Thank you very much!

I HAVE TO USE
d1.getShortDate() // returns the date as mm/dd/yyyy
public Date getThanksgiving(int year) { Date Thanksgiving = new Date(11, 1, year); int count = 1 ; int weekCount = 0; for ( ; count <= 30; count++) { if (Thanksgiving.getDayOfWeek().equals("Thursday")) { weekCount++; } if (weekCount == 4) { break; } Thanksgiving=new Date(10, count, year); } return Thanksgiving ;

And test class
SpeedDating thanksgiving = new SpeedDating() ; input = JOptionPane.showInputDialog ("Enter the year for november ") ; int year = Integer.parseInt(input) ; Date d1=SpeedDating.getThanksgiving(year); System.out.println(d1.getShortDate()) ;

My professor said to use this.
d1.getShortDate() // returns the date as mm/dd/yyyy
How would I use that?

Someone told me I have to use SimpleDateFormat
This is the loop that checks for the fourth thursday of november (thankgiving)

public Date getThanksgiving(int year)
{

Date Thanksgiving = new Date(11, 1, year);

int count = 1 ;
int weekCount = 0;
for ( ; count <= 30; count++)
{
if (Thanksgiving.getDayOfWeek().equals("Thursday")) {
weekCount++;
}
if (weekCount == 4) {
break;
}


}

This is the test class

SpeedDating thanksgiving = new SpeedDating() ;

input = JOptionPane.showInputDialog
("Enter the year for november ") ;

int year = Integer.parseInt(input) ;

System.out.println(thanksgiving.getThanksgiving(int year));

Basically the user inputs a year and my program supposed to print the date. For example, if the user inputs 2012 then my program will print out 11,22,2012. However my program is printing out something like Date@1ea0105 which someone told me was a reference (memory location). How can I fix this? Thank you.

I'm sorry this is my first semester to programming. And I'm having a lot of trouble. Should I repost so I can shorten the code? And what do you mean to get rid of the date constructor? I heard yo must use SimpleDateFormat or something like that in order to convert the date to a string. The problem is that I'm printing out the reference (memory location or something like that). But I have no Idea how to use the SimpleDateFormat. Can you help me? Thank you

/** * A class to give students experience using loops. This class creates and * manipulates objects of Greg's Date class. */ public class SpeedDating { // Note: this class has no instance variables! /** * Creates an empty SpeedDating object so that you can call the methods (a * constructor that takes no parameters is known as a "default" constructor) */ public SpeedDating() { } // Constructor has empty body /** * Prints the day of the week (e.g. "Thursday") on which Halloween will fall * for 10 consecutive years. * * @param startYear the first of the 10 consecutive years */ public void printHalloweens(int startYear) { int lastYear = startYear + 10; for (int i = startYear; i < lastYear; i++) { Date Halloween = new Date(10, 31, i); System.out.print(Halloween.getYear() + ", "); System.out.println(Halloween.getDayOfWeek() + ", "); } // TO DO: write body of this method here } // TO DO: write body of this method here /** * Computes and returns the Date on which Thanksgiving will fall in a given * year. * * NOTE: By law, Thanksgiving is the 4th Thursday in November * * @param year the year for which to compute the date of Thanksgiving * @return the Date of Thanksgiving for the specified year */ public Date getThanksgiving(int year) { Date Thanksgiving = new Date(11, 1, year); int count = 1; int weekCount = 0; for ( ; count <= 30; count++) { if (Thanksgiving.getDayOfWeek().equals("Thursday")) { weekCount++; } if (weekCount == 4) { break; } Thanksgiving.next(); } return Thanksgiving; } // TO DO: write body of this method here /** * Computes and returns the number of days between two dates, counting the * end date but not the start date. E.g., the number of days between * 11/1/2012 and 11/5/2012 is 4, not 5. * * Precondition: The start date must occur on or before the end date. * * @param start the earlier of the two dates * @param end the later of the two dates * * @return the number of days elapsed between the start date and the end * date */ public int countingTheDays(Date start, Date end) { do{ start.next(); }while(start.getMonth()>end.getMonth() && start.getDay() < end.getDay()); return start.getDay(); // TO DO: write body of this method here } } This is my tester class import javax.swing.JOptionPane; /* * To change this template, choose Tools | Templates * and open the template in the editor. */ /** * * @author */ public class SpeedDatingTester { public static void main (String args[]) { SpeedDating date=new SpeedDating(); String input = JOptionPane.showInputDialog ("Enter the halloween year ") ; int startYear = Integer.parseInt(input) ; date.printHalloweens(startYear); input = JOptionPane.showInputDialog ("Enter the year for november ") ; int year = Integer.parseInt(input) ; SpeedDating thanksgiving = new SpeedDating() ; System.out.println(thanksgiving.getThanksgiving(year)) ; input = JOptionPane.showInputDialog ("Enter the month ") ; int month = Integer.parseInt(input) ; input = JOptionPane.showInputDialog ("Enter the day ") ; int day = Integer.parseInt(input) ; input = JOptionPane.showInputDialog ("Enter the year ") ; } }


Why can't I print out the date for thanksgiving? Thank you.