Mega Code Archive
To increment or decrement a field of a calendar by 1 using the roll() method
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By +1 or -1, depending on the second argument(true or false).
import java.util.Calendar;
import java.util.GregorianCalendar;
public class MainClass {
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));
}
}
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