Here you can find the source of tomorrow(Calendar c)
public static Calendar tomorrow(Calendar c)
//package com.java2s; import java.util.Calendar; public class Main { public static Calendar tomorrow(Calendar c) { long offset = 1 * 24 * 60 * 60 * 1000; Calendar calendar = null; if (c != null) { calendar = c;//from w w w . j a v a2s . c om } else { calendar = Calendar.getInstance(); } calendar.setTimeInMillis(calendar.getTimeInMillis() + offset); return calendar; } }