Need help with Beginner java code
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Thread: Need help with Beginner java code

  1. #1
    Join Date
    Sep 2012
    Posts
    1

    Question 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.

  2. #2
    Join Date
    May 2006
    Location
    UK
    Posts
    4,474

    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.
    Posting code? Use code tags like this: [code]...Your code here...[/code]
    Click here for examples of Java Code

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