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.

Code Java:

 
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
 
		switch(weekday)
		{
		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 );
	}
}