30 day activation validation using java

Manisha Pandey's Avatar, Join Date: May 2010
Newbie Member
hi ,

i am trying 30 days activation validation for software.after 30 days if people use that software it should display, your trial period is completed if you want to use,you have to buy that particular software.
shabbir's Avatar, Join Date: Jul 2004
Go4Expert Founder
Just have some date of install written to some file and at start check if it is registered else show the message.
Manisha Pandey's Avatar, Join Date: May 2010
Newbie Member
i need code for 30 days trial version because i am facing problem with date validation. i can not compare with system date because anybody can change.
shabbir's Avatar, Join Date: Jul 2004
Go4Expert Founder
Get the BIOS Date then
sandesh17's Avatar, Join Date: Jun 2013
Newbie Member
but how can i get that in java????