How to controll dates in the best way

Question

Hello
I have a question regarding comparing dates. I'm about to make an application where the user can choose between 2 accounts 1)access for a week or 2) access for a month. So my first thought was to convert current date to milliseconds ( Number of milliseconds since 1/1/1970 (GMT)) which will be the "start date" and then add correct number of milliseconds to the "start date" to get exact "stop date". Then when the visitor is logging in I get the date of current day -->transform it to milliseconds (currentdate)-->and compare it to my "stopdatems" (A value in my class Visitor below") as I do below:
----------------------------------------controll when logging in-----------------------------------
Visitor v="Current visitor".
if(v.stopdatems<currentdate)[
ok=true;
-----------------------------------------Visitor--------------------------------------------------------
public class Visitor{
public String name;
public String idnr;
public Date startdate;
public Long startdatems; //startdate.getTime()
public Long stopdatems; //Lets say the visitor wants a trial for a week----> stopdatems=startdatems+(60*60*24*7*1000)
Is this a good way to do this or do you have any other suggestions
Thanks in advance!

Answer 1

Hi,
It's better to use the calendar class to increase the current date by one week or a month.
/Kaj