Fetch Epoch time

This should do what you're looking for:

import java.util.Calendar;

import java.util.Date;

import java.util.GregorianCalendar;

public class Main {

public Main() {

}

public static void main(String[] args) {

final long MS_PER_DAY = 24 * 60 * 60 * 1000;

// Get the current time

Date now = new Date();

// Get a time from yesterday

Date yesterday = new Date(now.getTime() - MS_PER_DAY);

Calendar calendar = new GregorianCalendar();

calendar.setTime(yesterday);

// Get the time yesterday morning at 12:00AM

calendar.set(Calendar.HOUR_OF_DAY, 0);

calendar.set(Calendar.MINUTE, 0);

calendar.set(Calendar.SECOND, 0);

Date yesterdayStart = calendar.getTime();

// Get the time yesterday night at 11:59:59PM

calendar.set(Calendar.HOUR_OF_DAY, 23);

calendar.set(Calendar.MINUTE, 59);

calendar.set(Calendar.SECOND, 59);

Date yesterdayEnd = calendar.getTime();

System.out.println(

"Yesterday start: " + yesterdayStart +

"\t Since Epoch:" + yesterdayStart.getTime());

System.out.println(

"Yesterday end:" + yesterdayEnd +

"\t Since Epoch:" + yesterdayEnd.getTime());

}

}

If you want to be slightly more efficient, you could take the "yesterdayStart.getTime()" and add (MS_PER_DAY - 1000) to get the yesterdayEndTime (or, even better, use -1 instead of -1000 if you want to get all the way to 11:59:59:999).

Jason_Waltona at 2007-7-15 3:32:51 >

One more question. I am trying to set the date to the last day of the last month. How can get the correct day since some months have 31 and others 30.

int prevMonth = calendar.get(Calendar.MONTH)-1;

calendar.set(Calendar.MONTH, prevMonth);

calendar.set(Calendar.DAY_OF_MONTH, 31);

is there a way to get and set the last day of a month?

Thanks

Ravi

Rmalghana at 2007-7-15 3:32:51 >