Java tutorial
//package com.java2s; import java.util.Calendar; public class Main { /** * Add the given amount of hours to the given calendar. The changes are reflected in the given * calendar. * @param calendar The calendar to add the given amount of hours to. * @param hours The amount of hours to be added to the given calendar. Negative values are also * allowed, it will just go back in time. */ public static void addHours(Calendar calendar, int hours) { calendar.add(Calendar.HOUR, hours); } }