Here you can find the source of getMillis(TimeZone tz, int year, int month, int day, int hour, int minute, int second, int millis)
Parameter | Description |
---|---|
tz | the timezone of the parameters |
year | the absolute year (positive or negative) |
month | the month (1-12) |
day | the day (1-31) |
hour | the hour (0-23) |
minute | the minutes (0-59) |
second | the number of seconds (0-59) |
millis | the number of milliseconds |
public static long getMillis(TimeZone tz, int year, int month, int day, int hour, int minute, int second, int millis)
//package com.java2s; //License from project: Open Source License import java.util.Calendar; import java.util.GregorianCalendar; import java.util.TimeZone; public class Main { private static int zoneOffset; private static Calendar cachedCalendar; /**/*from w ww .j a v a 2 s. c om*/ * Calculate the milliseconds since 1970-01-01 (UTC) for the given date and * time (in the specified timezone). * * @param tz the timezone of the parameters * @param year the absolute year (positive or negative) * @param month the month (1-12) * @param day the day (1-31) * @param hour the hour (0-23) * @param minute the minutes (0-59) * @param second the number of seconds (0-59) * @param millis the number of milliseconds * @return the number of milliseconds (UTC) */ public static long getMillis(TimeZone tz, int year, int month, int day, int hour, int minute, int second, int millis) { try { return getTimeTry(false, tz, year, month, day, hour, minute, second, millis); } catch (IllegalArgumentException e) { // special case: if the time simply doesn't exist because of // daylight saving time changes, use the lenient version String message = e.toString(); if (message.indexOf("HOUR_OF_DAY") > 0) { if (hour < 0 || hour > 23) { throw e; } return getTimeTry(true, tz, year, month, day, hour, minute, second, millis); } else if (message.indexOf("DAY_OF_MONTH") > 0) { int maxDay; if (month == 2) { maxDay = new GregorianCalendar().isLeapYear(year) ? 29 : 28; } else { maxDay = 30 + ((month + (month > 7 ? 1 : 0)) & 1); } if (day < 1 || day > maxDay) { throw e; } // DAY_OF_MONTH is thrown for years > 2037 // using the timezone Brasilia and others, // for example for 2042-10-12 00:00:00. hour += 6; return getTimeTry(true, tz, year, month, day, hour, minute, second, millis); } else { return getTimeTry(true, tz, year, month, day, hour, minute, second, millis); } } } private static long getTimeTry(boolean lenient, TimeZone tz, int year, int month, int day, int hour, int minute, int second, int millis) { Calendar c; if (tz == null) { c = getCalendar(); } else { c = Calendar.getInstance(tz); } synchronized (c) { c.clear(); c.setLenient(lenient); setCalendarFields(c, year, month, day, hour, minute, second, millis); return c.getTime().getTime(); } } private static Calendar getCalendar() { if (cachedCalendar == null) { cachedCalendar = Calendar.getInstance(); zoneOffset = cachedCalendar.get(Calendar.ZONE_OFFSET); } return cachedCalendar; } private static void setCalendarFields(Calendar cal, int year, int month, int day, int hour, int minute, int second, int millis) { if (year <= 0) { cal.set(Calendar.ERA, GregorianCalendar.BC); cal.set(Calendar.YEAR, 1 - year); } else { cal.set(Calendar.ERA, GregorianCalendar.AD); cal.set(Calendar.YEAR, year); } // january is 0 cal.set(Calendar.MONTH, month - 1); cal.set(Calendar.DAY_OF_MONTH, day); cal.set(Calendar.HOUR_OF_DAY, hour); cal.set(Calendar.MINUTE, minute); cal.set(Calendar.SECOND, second); cal.set(Calendar.MILLISECOND, millis); } }