Setting file permissions in java

Hi,
Iam uploading a file to a folder which exists on a unix machine.
Iam using struts FormFile to upload a file.
After uploading a file i observed that the permissions for the uploaded file are like this
rw_ r-- r--
for the owner it give read and write and for the rest only read permission.
But i want read and write permissions for all the three.
is there any way from java to change the permissions for a file on UNIX machine while uploading?
I know RunTime.exec() . But they mentioned that it runs as a separate process instead of a thread.
Can i use that? is there any problem by using RunTime..
is there any other way to set permissions for file in java?

You will have to use Runtime.exec(). Java doesn't allow you to set file permissions this specifically.
http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html
Otherwise, you might want to look at this:
http://www.jguru.com/faq/view.jsp?EID=19558

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I have been able to select a file at a time in the finder and use the get-info option to change the permissions, but I need to do this for thousands of files and it takes too long manually.
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Hello Abby,
Thanks for posting here.
I would like to know how you're trying to change File permissions. Is that by using FileZilla or something?
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Related Thread:
http://social.msdn.microsoft.com/Forums/windowsazure/en-US/50e94a19-066b-443e-a70a-4fe3d99a6e95/how-to-set-file-permissions?forum=windowsazurewebsitespreview
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I'm relatively new to Java. I'm creating a program that will be running on 40 terminals, and will simulate a wireless mobile network. Our teacher has instructed that we should simply use a text file to keep track of where all the nodes are in the network, and when a node moves, it simply updates that text file. I'm looking to have some sort of system where the process checks to see if the text file has write permission, and if so, it will turn the permission to read-only, update the file, then set it back to write so nodes will be able to access the file and update locations while another node is updating, but another node will not be able to write to it until the node holding it has finished.
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Setting file permissions in java

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