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September 28th, 2012, 01:00 AM
#1
Need help with Beginner java code
Hi guys i am currently taking a java class and have never programmed before. i need to write a program that takes 3 parameters (month, day, year). Then outputs the day of the week, the date, whether or not the year is a leap year and the number of days left in the year. I have everything working except for the day of the week and the number of days left in the year.
Here is my code:
Code:
import java.util.*;
import java.util.GregorianCalendar;
import java.text.DateFormat;
public class leapYear {
public static void main(String[] args) throws Exception {
GregorianCalendar newCal = new GregorianCalendar();
int m = Integer.parseInt (args[0]);
int d = Integer.parseInt (args[1]);
int y = Integer.parseInt (args[2]);
newCal.set(y, m, d);
String[] months = new String[]{
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December",
};
System.out.println( (newCal.get(Calendar.DAY_OF_WEEK)) + " - " + (months[newCal.get(Calendar.MONTH) - 1]) + " " + d + ", " + y);
if(newCal.isLeapYear(y) == true)
{
System.out.println(y + " is a leap year");
}
else
{
System.out.println(y + " is Not a leap year");
}
int dayOfYear = newCal.get(newCal.DAY_OF_YEAR);
int lastDayOfYear = newCal.getActualMaximum(Calendar.DAY_OF_YEAR);
int diff = lastDayOfYear - dayOfYear;
System.out.println("There are " + diff + " days left in the year.");
}
}
i would really appreciate if someone can help me out.
Thank You.
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September 28th, 2012, 02:26 PM
#2
Re: Need help with Beginner java code
Your problem is down to the strange design of the Calendar class. For some unknown reason everything is 1 based except for month which is 0 based, so when you create your Calendar you need to subtract 1 from the month. Note you will need to remove the -1 you've mistakenly added in the month name look up code presumably to get the right month name to print out.
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