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java - Number of days since registration

I code a little Console program and now I store the date they joined in a database like.

CreateDate
2011-04-15 17:52:57

Now I want to do a check like this: a function that gets how many days the guy have been registered.

if(player.getDaysSinceRegistration) { 

Thanks for any help.

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joda-time has an easy way to do this:

Days.daysBetween(new DateTime(registeredDate), new DateTime()).getDays();

Without 3rd party libraries:

(System.currentTimeMillis() - registeredDate.getTime()) / MILLIS_PER_DAY;

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