Add or substract minutes to current time using Java Calendar

/*
  Add or substract minutes to current time using Java Calendar
  This example shows how to add or substract minutes in current time  
  using Java Calendar class.
*/
 
import java.util.Calendar;
 
public class AddMinutesToCurrentDate {
 
  public static void main(String[] args) {
 
    //create Calendar instance
    Calendar now = Calendar.getInstance();
 
    System.out.println("Current time : " + now.get(Calendar.HOUR_OF_DAY)
                      + ":"
                      + now.get(Calendar.MINUTE)
                      + ":"
                      + now.get(Calendar.SECOND));
 
    //add minutes to current date using Calendar.add method
    now.add(Calendar.MINUTE,20);
 
    System.out.println("New time after adding 20 minutes : " 
                      + now.get(Calendar.HOUR_OF_DAY)
                      + ":"
                      + now.get(Calendar.MINUTE)
                      + ":"
                      + now.get(Calendar.SECOND));
 
    /*
     * Java Calendar class automatically adjust the date or hour accordingly 
if adding minutes to the current time causes current hour or date to be changed.
     */ 
 
 
    //substract minutes from current date using Calendar.add method
    now = Calendar.getInstance();
    now.add(Calendar.MINUTE, -50);
 
    System.out.println("Time before 50 minutes : " + now.get(Calendar.HOUR_OF_DAY)
                      + ":"
                      + now.get(Calendar.MINUTE)
                      + ":"
                      + now.get(Calendar.SECOND));
 
  }
}
 
/*
Typical output would be
Current time : 16:34:11
New time after adding 20 minutes : 16:54:11
Time before 25 minutes : 15:44:11
*/