counting down in java

[decade10]

hi,

whilst i was trying to do this program in javascript, i have been told that javascript isn't the right language to use (it needs to interact with a database, which javascript supposedly doesn't do).


it would be for a library reservation system. this would be put on the computers with sessions from 15 minutes to 2 hours (in 15 minute chunks i.e, 15, 30, 45, 1 hour).

this program would countdown the remaining time on their session, with pop-up messages appearing every so often.

at the end of the session, the program will have to automatically log the user off.

any tips would be appreciated, thanks

[Fou-Lu]

Yes, this cannot be done with javascript by itself if you want to interact with a database.
Look at the Timer: http://download.oracle.com/javase/1....til/Timer.html which includes a schedule and allows you to execute a TimerTask every x milliseconds.
The TimerTask itself will need to be extended and overridden, and runs as a thread, so the run() must be overridden to take care of the task you want (such as a JDialog).