Question

I have a datetime in a variable previous. Now i want to check if the previous datetime is more than twenty minutes before the current time.

Date previous = myobj.getPreviousDate();

Date now = new Date();

//check if previous was before 20 minutes from now ie now-previous >=20

How can we do it?

Answer 1

Use

if (now.getTime() - previous.getTime() >= 20*60*1000) {
    ...
}

Or, more verbose, but perhaps slightly easier to read:

import static java.util.concurrent.TimeUnit.*;

...

long MAX_DURATION = MILLISECONDS.convert(20, MINUTES);

long duration = now.getTime() - previous.getTime();

if (duration >= MAX_DURATION) {
    ...
}