Here you can find the source of now()
public static String now()
//package com.java2s; /* Copyright (C) 2010-2011, Mamadou Diop. * Copyright (C) 2011, Doubango Telecom. * * Contact: Mamadou Diop <diopmamadou(at)doubango(dot)org> * /* w ww. j ava 2 s .c o m*/ * This file is part of imsdroid Project (http://code.google.com/p/imsdroid) * * imsdroid 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 3 * of the License, or (at your option) any later version. * * imsdroid 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., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; public class Main { static final DateFormat sDefaultDateFormat = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss"); public static String now(String dateFormat) { Calendar cal = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateFormat(dateFormat); return sdf.format(cal.getTime()); } public static String now() { Calendar cal = Calendar.getInstance(); return sDefaultDateFormat.format(cal.getTime()); } }