How to refresh .properties files.

Hi,
I am using Struts 2.0.
Here is my question:
I have admin. section where I have provided facility to change the caption of label displayed at public side.
Name of labels come from .properties file. Now using Property object I access my resourse file & using setProperty() method I have changed value of respective key.
To get conformation that changes are affected I have openned this file & diplayed it on console. Changes are made successfully but when I see the label of public side, they are unchanged (After refreshing web page).
According to my knowledge, when ever application is loaded first contents of .properties file are loaded in memory, so even if we change the file contents, references present in memory are not changed.
Is there any way by which I can refresh memory content.
Since .properties file is change but its change are not affected on memory.
Possible solution for it is that I shall restart my application. Is that possible by programming.
Any other solutions will be appreciated.

Yes,
.properties files is updated perfectly.
One of the thing which I noticed is that when I openned .properties file to check updates and close it, Now I pressed refresh button, Change are found to be made on Browser.
But next time I again made changes but didn't open .properties file & pressed refresh button no changes where made on browser.
So I found that by openning file explicitly change are made in browser,
Keeping this thing in mind I created on File object & displayed entire file on console.
It showed changed file content, but changes are not found on Browser.
So whats exactly happening here?

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Message was edited by:
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means we have to read file every time Know but i dont
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