Get day of the week from GregorianCalendar

Question

I have a date and I need to know the day of the week, so I used a GregorianCalendar object but I get back some dates that are incorrect.

GregorianCalendar calendar = new GregorianCalendar(year, month, day);
int i = calendar.get(Calendar.DAY_OF_WEEK);

What am I doing wrong?

Thanks!

EDIT SOLUTION:

mont--;
GregorianCalendar calendar = new GregorianCalendar(year, month, day);
int i = calendar.get(Calendar.DAY_OF_WEEK);

    if(i == 2){
        dayOfTheWeek = "Mon";           
    } else if (i==3){
        dayOfTheWeek = "Tue";
    } else if (i==4){
        dayOfTheWeek = "Wed";
    } else if (i==5){
        dayOfTheWeek = "Thu";
    } else if (i==6){
        dayOfTheWeek = "Fri";
    } else if (i==7){
        dayOfTheWeek = "Sat";
    } else if (i==1){
        dayOfTheWeek = "Sun";
    }

Answer 1

TimeZone timezone = TimeZone.getDefault();
Calendar calendar = new GregorianCalendar(timezone);
calendar.set(year, month, day, hour, minute, second);

String monthName=calendar.getDisplayName(Calendar.MONTH, Calendar.SHORT, Locale.getDefault());//Locale.US);
String dayName=calendar.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.SHORT, Locale.getDefault());//Locale.US);

Answer 2

Joda-Time

I use Joda-Time library for all date/time related operations. Joda takes into account you locale and gets results accordingly:

import org.joda.time.DateTime;
DateTime date = new DateTime(year, month, day, 0, 0, 0);

or

DateTime date = DateTime().now();

Day of week (int):

date.getDayOfWeek();

Day of week (short String) using toString() and DateTimeFormat options:

date.toString("EE");