Java Date Time - Java Calendar.roll(int field, int amount)

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Syntax

Calendar.roll(int field, int amount) has the following syntax.

public void roll(int field, int amount)

Example

In the following code shows how to use Calendar.roll(int field, int amount) method.

//  ww  w  . j  a  va2  s . co  m

import java.util.Calendar;

public class Main {

   public static void main(String[] args) {

      Calendar cal = Calendar.getInstance();
      
      // display the current calendar
      System.out.println("Month is " + cal.get(Calendar.MONTH));

      // roll month
      cal.roll(Calendar.MONTH, 2);

      // print result after rolling
      System.out.println("Month is " + cal.get(Calendar.MONTH));
      
      // roll downwards
      cal.roll(Calendar.MONTH, -4);
      
      // print result
      System.out.println("Month is " + cal.get(Calendar.MONTH));
   }
}

The code above generates the following result.

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