How to convert date format to milliseconds?

Question

How to get the millisecond time from date? I have the following code.

Date beginupd = new Date(cursor1.getLong(1));

This variable beginupd contains the format

Wed Oct 12 11:55:03 GMT+05:30 2011

Now how to convert this format to the millisecond time in Long datatype?

Eliza

Answer 1

long millisecond = beginupd.getTime();

Date.getTime() JavaDoc states:

Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT represented by this Date object.

Exurbia

Wonderful! Glad to have been of help. – Exurbia

Answer 2

date.setTime(milliseconds);

this is for set milliseconds in date

long milli = date.getTime();

This is for get time in milliseconds.

Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT

Crore

Answer 3

You could use

Calendar cal = Calendar.getInstance();
cal.setTime(beginupd);
long millis = cal.getTimeInMillis();

Ecology

Works, and Calendar is more intuitive than Date. – Ecology

Constructing a Calendar, setting the Date and then requesting it back using getTimeInMillis() is simpler than calling Date.getTime()? – Morganstein

I think @Ecology meant Calendar cal = Calendar.getInstance(); cal.set(2011,9,12,5,42,0); long ms = cal.getTimeInMillis(); is more intuitive than using old Date API even if his answer is less simple. – Ecclesiastes

Answer 4

beginupd.getTime() will give you time in milliseconds since January 1, 1970, 00:00:00 GMT till the time you have specified in Date object

Creolized