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Thread: GregorianCalendar problems

  1. #1
    Junior Member
    Join Date
    Apr 2011
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    Default GregorianCalendar problems

    Hey, I need to work out the date and day it will be a 100 days from now.

    I came up with the following code by looking at the API and a few tutorials but for some reason its wrong, it gives me the result as 2/7/2011 and the day being Tuesday.

    First, the date given is not 100 days from now.
    Second, the 2nd of July 2011 is a Saturday.

    Anyone know what I am doing wrong? Would appreciate the help, thank you.

    import java.util.Calendar;
    import java.util.GregorianCalendar;
    public class Calender 
    	public static void main(String Args[])
    		GregorianCalendar cal = new GregorianCalendar();
    		cal.add(Calendar.DAY_OF_MONTH, 100); //add 100 days to current date
    		int year = cal.get(Calendar.YEAR);//get year
    		int month = cal.get(Calendar.MONTH);//get month
    		int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH); //get day of month
    		int weekday = cal.get(Calendar.DAY_OF_WEEK);//gets the day of the week.
    		String dayweek = "Notset";//day of week
    		case 1: dayweek = "Sunday"; 			break;
    		case 2: dayweek = "Monday"; 			break;
    		case 3: dayweek = "Tuesday"; 			break;
    		case 4: dayweek = "Wednesday"; 	        break;
    		case 5: dayweek = "Thursday"; 			break;
    		case 6: dayweek = "Friday"; 		        break;
    		case 7: dayweek = "Saturday";			break;
    		default:dayweek = "Invalid day"; 		        break;
    		System.out.println("The date, 100 days from today will be: " + dayOfMonth + "/" + month +  "/" + year);
    		System.out.println("The day, 100 days from today will be: " + dayweek );
    Last edited by Crixus; April 23rd, 2011 at 09:27 PM.

  2. #2
    Administrator copeg's Avatar
    Join Date
    Oct 2009
    Thanked 827 Times in 770 Posts
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    Default Re: GregorianCalendar problems

    Months in the Calendar or 0 based, so you must take this into account when using the results returned by Calendar

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