Need help writting an expiration date

[bob morkos]

Hi,
I need to write a one year expiration date function. Any sample code would be appreciated, I don't know either to use the date calendar or the SimpleDateFormat? Thanks in advance for any help.

[Chris De Vries]

You can do something like:

import java.util.Calendar;
...
Calendar today = Calendar.getInstance();
Calendar expires = Calendar.getInstance();
expires.set(2004,0,1,0,0,0);
if(today.after(expires)) {
  System.err.println("This software is expired.");
  System.exit(1);
}
...

Which will cause the software to expire on January 1, 2004.
Chris

[bob morkos]

What does these parameters mean for:
expires.set(2004,0,1,0,0,0);
The only one that I can guess is 2004. I want to set the expire date one year from the current date.

Originally posted by Chris De Vries:
You can do something like:

import java.util.Calendar;
...
Calendar today = Calendar.getInstance();
Calendar expires = Calendar.getInstance();
expires.set(2004,0,1,0,0,0);
if(today.after(expires)) {
  System.err.println("This software is expired.");
  System.exit(1);
}
...

Which will cause the software to expire on January 1, 2004.
Chris

[James Swan]

to get a date 1 year from now use the following:

import java.util.*;
public class OneYearFromNow {
    public static void main(String[] args) {
        Calendar calendar = Calendar.getInstance();
        Date now = calendar.getTime();
        System.out.println(now);
        calendar.add(Calendar.YEAR,1);
        Date oneYearFromNow = calendar.getTime();
        System.out.println(oneYearFromNow);
    }
}

[Chris De Vries]

The Java API docs are a good place to go if you want to find out more about a method call.
Calendar.set(int,int,int,int,int,int) is documented there. The arguments are year, month (starting with 0), date, hour, minute, and second.
[ October 06, 2003: Message edited by: Chris De Vries ]

[bob morkos]

The date field do they mean the day of the month. Thanks for your reply. But, I'm using jdk1.3.1 and not jdk1.4, can I still use the set calendar function.

Originally posted by Chris De Vries:
The Java API docs are a good place to go if you want to find out more about a method call.
Calendar.set(int,int,int,int,int,int) is documented there. The arguments are year, month (starting with 0), date, hour, minute, and second.
[ October 06, 2003: Message edited by: Chris De Vries ]

[Jim Yingst]

But, I'm using jdk1.3.1 and not jdk1.4
Use the API at http://java.sun.com/j2se/1.3/docs/api/index.html
This can also be found from http://java.sun.com/docs