Here you can find the source of isToday(Calendar today, Calendar date)
public static boolean isToday(Calendar today, Calendar date)
//package com.java2s; /*//from w ww . ja v a2 s . co m * Copyright (C) 2011 Nguyen Hoang Ton, a.k.a Ton Nguyen - tonng86@gmail.com * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ import java.util.Calendar; import java.util.Date; import java.util.TimeZone; public class Main { public static boolean isToday(Calendar today, Calendar date) { if (date == null) { return true; } Calendar otherday = getCalendar(); otherday.setTime(date.getTime()); return otherday.get(Calendar.YEAR) == today.get(Calendar.YEAR) && otherday.get(Calendar.MONTH) == today .get(Calendar.MONTH) && otherday.get(Calendar.DAY_OF_MONTH) == today .get(Calendar.DAY_OF_MONTH); } public static boolean isToday(Calendar date) { Calendar today = getCalendar(); return isToday(today, date); } public static Calendar getCalendar() { setDefaultTimeZoneToVietnam(); Calendar today = Calendar.getInstance(); today.setTime(new Date()); return today; } private static Calendar getCalendar(int year, int month, int dayOfMonth, int hourOfDay, int minute) { Calendar startRollingTime = Calendar.getInstance(); startRollingTime.set(Calendar.YEAR, year); startRollingTime.set(Calendar.MONTH, month); startRollingTime.set(Calendar.DAY_OF_MONTH, dayOfMonth); startRollingTime.set(Calendar.HOUR_OF_DAY, hourOfDay); startRollingTime.set(Calendar.MINUTE, minute); startRollingTime.set(Calendar.SECOND, 00); return startRollingTime; } private static void setDefaultTimeZoneToVietnam() { // set default time zone to Vietnam TimeZone.setDefault(TimeZone.getTimeZone("GMT+7")); } }