Here you can find the source of timestampToTicks(int year, int month, int day, int hours, int minutes, int seconds, int milliseconds)
| Parameter | Description |
|---|---|
| year | The year. |
| month | The month. |
| day | The day. |
| hours | The hours. |
| minutes | The minutes. |
| seconds | The seconds. |
| milliseconds | The milliseconds. |
public static long timestampToTicks(int year, int month, int day, int hours, int minutes, int seconds, int milliseconds)
//package com.java2s; /*// w w w . j a va2 s. c o m * Copyright The Sett Ltd, 2005 to 2014. * * 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. */ public class Main { /** The number of milliseconds in a second. */ private static final int MILLIS_PER_SECOND = 1000; /** The number of milliseconds in a minute. */ public static final int MILLIS_PER_MINUTE = 60 * MILLIS_PER_SECOND; /** The number of milliseconds in an hour. */ public static final int MILLIS_PER_HOUR = 60 * MILLIS_PER_MINUTE; /** The number of milliseconds in a day. */ private static final int MILLIS_PER_DAY = 24 * MILLIS_PER_HOUR; /** The number of days from 0000 to 1970. */ private static final int DAYS_TO_1970 = 719527; /** Tables the number of days in the year prior to the start of each month, for leap years. */ private static final int[] LEAP_DAYS_IN_YEAR_PRIOR_TO_MONTH = { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335 }; /** Tables the number of days in the year prior to the start of each month. */ private static final int[] USUAL_DAYS_IN_YEAR_PRIOR_TO_MONTH = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }; /** * Converts a field by field timestamp into millisecond ticks. * * @param year The year. * @param month The month. * @param day The day. * @param hours The hours. * @param minutes The minutes. * @param seconds The seconds. * @param milliseconds The milliseconds. * * @return Millisecond ticks since midnight 01/01/1970. */ public static long timestampToTicks(int year, int month, int day, int hours, int minutes, int seconds, int milliseconds) { boolean isLeapYear = isLeapYear(year); long dayComponent = (long) (day - 1) * MILLIS_PER_DAY; long monthComponent = millisToStartOfMonth(month, isLeapYear); long yearComponent = millisToYearStart(year); long hoursComponent = (long) hours * MILLIS_PER_HOUR; long minutesComponent = (long) minutes * MILLIS_PER_MINUTE; long secondsComponent = (long) seconds * MILLIS_PER_SECOND; return dayComponent + monthComponent + yearComponent + hoursComponent + minutesComponent + secondsComponent + milliseconds; } /** * Converts a field by field timestamp into millisecond ticks. * * @param year The year. * @param month The month. * @param day The day. * @param hours The hours. * @param minutes The minutes. * @param seconds The seconds. * * @return Millisecond ticks since midnight 01/01/1970. */ public static long timestampToTicks(int year, int month, int day, int hours, int minutes, int seconds) { boolean isLeapYear = isLeapYear(year); long dayComponent = (long) (day - 1) * MILLIS_PER_DAY; long monthComponent = millisToStartOfMonth(month, isLeapYear); long yearComponent = millisToYearStart(year); long hoursComponent = (long) hours * MILLIS_PER_HOUR; long minutesComponent = (long) minutes * MILLIS_PER_MINUTE; long secondsComponent = (long) seconds * MILLIS_PER_SECOND; return dayComponent + monthComponent + yearComponent + hoursComponent + minutesComponent + secondsComponent; } /** * Converts a field by field timestamp into millisecond ticks. * * @param year The year. * @param month The month. * @param day The day. * * @return Millisecond ticks since midnight 01/01/1970. */ public static long timestampToTicks(int year, int month, int day) { boolean isLeapYear = isLeapYear(year); long dayComponent = (long) (day - 1) * MILLIS_PER_DAY; long monthComponent = millisToStartOfMonth(month, isLeapYear); long yearComponent = millisToYearStart(year); return dayComponent + monthComponent + yearComponent; } /** * Determines whether or not a year is a leap year. This takes no account of when leap years were first introduced, * so will not be accurate for ancient dates. * * @param year The year. * * @return <tt>true</tt> if the year is a leap year. */ private static boolean isLeapYear(int year) { if ((year & 3) != 0) { return false; } if ((year % 100) != 0) { return true; } return (year % 400) == 0; } /** * Given a month, numbered from 1 to 12, calculates the number of milliseconds to the start of that month in a year. * * @param month The month. * @param leapYear <tt>true</tt> if the year is a leap year. * * @return The number of milliseconds to the start of the month. */ private static long millisToStartOfMonth(int month, boolean leapYear) { return (long) (leapYear ? LEAP_DAYS_IN_YEAR_PRIOR_TO_MONTH[month - 1] : USUAL_DAYS_IN_YEAR_PRIOR_TO_MONTH[month - 1]) * MILLIS_PER_DAY; } /** * Calculates the number of milliseconds to the start of the specified year, taking 1970 as zero. * * @param year The year. * * @return The number of milliseconds to the start of the specified year, taking 1970 as zero. */ public static long millisToYearStart(int year) { // Calculate how many leap years elapsed prior to the year in question. int leapYears = year / 100; if (year < 0) { leapYears = ((year + 3) >> 2) - leapYears + ((leapYears + 3) >> 2) - 1; } else { leapYears = (year >> 2) - leapYears + (leapYears >> 2); if (isLeapYear(year)) { leapYears--; } } return ((year * 365L) + leapYears - DAYS_TO_1970) * MILLIS_PER_DAY; } }