Here you can find the source of now()
public static String now()
//package com.java2s; /**//from ww w.j a va2 s .c o m * Copyright (c) 2015-2016, Michael Yang ?????? (fuhai999@gmail.com). * * Licensed under the GNU Lesser General Public License (LGPL) ,Version 3.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.gnu.org/licenses/lgpl-3.0.txt * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.text.SimpleDateFormat; import java.util.Date; public class Main { static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); public static String now() { return sdf.format(new Date()); } public static String format(Date date) { if (null == date) return null; return sdf.format(date); } }