Java Date add hour

import java.util.Calendar;
import java.util.Date;

public class Main {
  public static void main(String[] argv) {
    Date startDate = new Date();
    int addnos = 42;
    System.out.println(addHour(startDate, addnos));
  }/* w w w .  j  a v a  2 s .  co  m*/

  public static Date addHour(Date startDate, int addnos) {
    Calendar cc = Calendar.getInstance();
    if (startDate != null) {
      cc.setTime(startDate);
      cc.add(Calendar.HOUR, addnos);
      return cc.getTime();
    } else {
      return null;
    }
  }
}