Adjust Calendar date automatically in Java

//www.j  a v a2 s. com
import java.util.Calendar;

public class Main {

  public static void main(String[] args) {
    Calendar now = Calendar.getInstance();
    System.out.println("Current Date : " + (now.get(Calendar.MONTH) + 1) + "-"
        + now.get(Calendar.DATE) + "-" + now.get(Calendar.YEAR));
    System.out.println("Current time : " + now.get(Calendar.HOUR_OF_DAY) + ":"
        + now.get(Calendar.MINUTE) + ":" + now.get(Calendar.SECOND));

   System.out.println("New date after adding 10 hours : " + (now.get(Calendar.MONTH) + 1) + "-"
       + now.get(Calendar.DATE) + "-" + now.get(Calendar.YEAR));  }
}