Rolling Time Span in Java
In the previous example of adding and subtracting time
span we have added and subtracted the time spans accordingly and since add()
method automatically do the rolling according to the calendar.
We can roll up the current date by one day as calendar.roll(Calendar.DATE,true);
For rolling current month up by one we can write code
as calendar.roll(Calendar.MONTH,true);
We can also roll year up by one year as calendar.roll(Calendar.YEAR,true); Here
the second parameter's Boolean value true means rolling in upward
direction and false means downwards.
Here is the full example code of RollingTimeSpan.java
as follows:
RollingTimeSpan.java
import java.text.*;
import java.util.Calendar;
import java.util.GregorianCalendar;
public class RollingTimeSpan
{
public static void main(String[] args)
{
// set calendar to 10 DECEMBER 2008
Calendar calendar = new GregorianCalendar(2008,Calendar.DECEMBER,10);
System.out.println("Before Rolling date is: ");
SimpleDateFormat formatter = new SimpleDateFormat("d-MMMM-yyyy hh:mm");
System.out.println(formatter.format(calendar.getTime()));
System.out.println("-------------- Rolling -----------------");
// Rolling Date
calendar.roll(Calendar.DATE,true);
// Rolling Month
calendar.roll(Calendar.MONTH,true);
// Rolling Year
calendar.roll(Calendar.YEAR,true);
System.out.println("After Rolling 1 day 1 Month and 1 Year date is: ");
formatter = new SimpleDateFormat("d-MMMM-yyyy hh:mm");
System.out.println(formatter.format(calendar.getTime()));
}
}
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Output:
C:\DateExample>javac RollingTimeSpan.java
C:\DateExample>java RollingTimeSpan
Before Rolling date is:
10-December-2008 12:00
-------------- Rolling -----------------
After Rolling 1 day 1 Month and 1 Year date is:
11-January-2009 12:00 |
Download Source Code
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