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