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