Here you can find the source of dateToLong(Date date)
public static long dateToLong(Date date)
//package com.java2s; /************************************************************************ * Copyright (c) 2014-2015 IoT-Solutions e.U. * /*from w ww. j ava 2s .c o m*/ * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 * * 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.sql.Time; import java.sql.Timestamp; import java.util.Date; public class Main { public static long dateToLong(Date date) { long millis = date.getTime(); if (date instanceof java.sql.Date) return millis; else if (date instanceof Time) return millis; else if (date instanceof Timestamp) return millis; return (millis / 1000) * 1000; } }