URGENT :- Hide folder / file using Java

[Rohit Bhagwat]

Hello friends

Can anyone tell me how to hide file or folder using java.

Waiting for your reply...

Thanks and Regards
Rohit

[Arto Pastinen]

Rename file so, that it starts with dot.

example:
"myfolder" => ".myfolder"

Same works with files.

.. of course this works only in linux, or maby in mac&solaris, not sure.

- Artsi

[William Brogden]

Hide in what sense? Hide from the operating system user or hide from Java code that uses java.io.File to get file listings?
Bill

[Ilja Preuss]

http://faq.javaranch.com/view?HowToAskQuestionsTheSmartWay

[Rohit Bhagwat]

Hello friends

Thank you very much for your replies and time spent in answering my queries.

I am working on windows platform so folder cannot be renamed to a name that start with . (Dot .)

I want to hide from OS user. I mean I shouldnt be able to see that file/folder in windows if the option "Do not show hidden files/folders" is set in folders options.

Please help !!

Thanks and Regards
Rohit.

[Ilja Preuss]

As far as I know, Java doesn't provide a way to do that, as it's highly platform specific.

[Sripathi Krishnamurthy]

File or folder cant be set to hidden from java. You have to use JNI (java native interface) to do so. I had one requirement to find the free space in a drive in windows machine and I used JNI to do so. This is another candidate for JNI.

[Emmy Rauch]

You don't need to use JNI to do this, you can just use STring cmd[] = {"attrib","+h",filename}; Runtime.getRuntime().exec(cmd); , (assuming you only want it to ever run on windows)

[Rohit Bhagwat]

Hello Emmy

I will try your solution..

Thanks for the time spent in giving response..

Your solution seems interesting so I will try it out.

Till now I was trying to get help of JNI.. But I will be impressed if your solution works out..

Thanks sir and also Thanks to all those who have posted their response.

Regards
Rohit.

[Rohit Bhagwat]

Hello Emmy Rauch

Thanks very much for your reply.

It did worked!!

Thanks and Regards
Rohit.

[Sripathi Krishnamurthy]

Emmy,
Is there any similar way to get the free space from hard drive too?
Assuming that I will pass the drive letter to the function and it will return the total hard disc space & available hard disc space?

Thanks

[Sripathi Krishnamurthy]

ok, never mind.
Sun has taken this as a priority. It will be available in "Mustang", java release in 2006. There will be methods to get the free space and total space.
http://bugs.sun.com/bugdatabase/view_bug.do;:YfiG?bug_id=4057701

[Karthik Jayachandran]

i got this method working....

public void hideFileOrFolder(File file){

try{
Runtime.getRuntime().exec("attrib +a +s +h \""+file.getAbsolutePath().toString()+"\"");
}catch(Exception e){}

}


and to unhide a file or folder, just set "attrib -a -s -h"

[Campbell Ritchie]

Thank you, but after nearly 4 years the original poster may have given up waiting for an answer. Please read this dreadfully-named FAQ.