File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Java in General and the fly likes How to store compile time data in Java Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Java in General
Bookmark "How to store compile time data in Java" Watch "How to store compile time data in Java" New topic

How to store compile time data in Java

Avinash Rai
Ranch Hand

Joined: Apr 26, 2001
Posts: 40
Hi All
Is there any way to store compile time data in Java?
For example I want to compile one class which displays today's date and time. I am using Calender class to do this.
And This today's date is displayed in About box of my application.
But what is happening is if I open my application 4 days from now it displays the date current on that day and not today's date when I compiled my application.
I know all objects are created at runtime in Java.
But was interested does any one knows a trick on how to do this.
Blake Minghelli
Ranch Hand

Joined: Sep 13, 2002
Posts: 331
Well, just a thought off the top of my head... there's probably a better way of doing it...
Your build process could include the execution of a java program that generates another java class that stores the compile time date. For example, the program would use a PrintWriter to actually write a java source file that contains a static constant that is initialized with the current date. Like this:

Your build routine can compile the new HelpInfo source file and include it in your release. Then, your "About" frame could get the compile date via HelpInfo.COMPILE_DATE.
Good luck!
[ October 16, 2002: Message edited by: Blake Minghelli ]

Blake Minghelli<br />SCWCD<br /> <br />"I'd put a quote here but I'm a non-conformist"
Lewin Chan
Ranch Hand

Joined: Oct 10, 2001
Posts: 214
This is a similar idea, why not have a properties file that is generated by your build process that has a timestamp in it,
Then you can just use that pre-defined property as the source of your "about box"

I have no java certifications. This makes me a bad programmer. Ignore my post.
I agree. Here's the link:
subject: How to store compile time data in Java
jQuery in Action, 3rd edition