Expiration Date control program

This question already has an answer here:

Number of days between two dates in Joda-Time 6 answers

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Java has a built in date class which has many problematic issues, so it is not worth using. Instead, the Joda-Time api offers a reliable Java date and time API.

The API and some information about it can be found at http://www.joda.org/joda-time/.

A similar question has been asked already, and some answers and some example codes can be found at Number of days between two dates in Joda-Time.

For your case, instantiating a new time with a default constructor will give the system time: DateTime dt = new DateTime();

Once you get the expiration date from the database, just compare it to the system time as described in the question linked in my answer.

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If you are code in Java that will be hard 'cause you can easily decompile java and remove that part.

Maybe this:

public int DaysLeft(long DBDateTimeStamp) //Unix time
{
long curr = System.currentTimeMillis()/1000;
long left = DBDateTimeStamp - curr;
int left = left / (60*60*24);
return left;
}

or something like that.

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