Increment or decrement a field of a calendar by 1 using the roll() method in Java
Description
The following code shows how to increment or decrement a field of a calendar by 1 using the roll() method.
By +1 or -1, depending on the second argument(true or false).
Example
/*from w w w . j a va 2 s . c o m*/
import java.util.Calendar;
import java.util.GregorianCalendar;
public class Main {
public static void main(String[] a) {
GregorianCalendar calendar = new GregorianCalendar();
calendar.roll(Calendar.MONTH, false); // Go back a month
System.out.println(calendar.get(Calendar.MONTH));
}
}
The code above generates the following result.
