import java.util.Calendar;

public class Main {

    

    public void incrementDate(Calendar cal) {

        

        int daysToIncrement = 5;

 

        cal.add(Calendar.DATE, daysToIncrement);

        System.out.println("Date after increment: " + cal.getTime());

    }

    

    public void decrementDate(Calendar cal) {

        

        int monthsToDecrement = -1;

        cal.add(Calendar.MONTH, monthsToDecrement);

        System.out.println("Date after decrement: " + cal.getTime());

 

    }

    /**

     * @param args the command line arguments

     */

    public static void main(String[] args) {

        

        Calendar cal = Calendar.getInstance();

        System.out.println("Now : " + cal.getTime());

        Main main = new Main();

        main.incrementDate(cal);

        main.decrementDate(cal);

    }

}

 

 

Since both the increment and decrement methods are called with the same instance of the Calendar class, the output from the code example showed this when it was executed:

Now : Wed Oct 01 18:15:15 CEST 2008

Date after increment: Mon Oct 06 18:15:15 CEST 2008

Date after decrement: Sat Sep 06 18:15:15 CEST 2008