New to Java - How to check if a file is already open

[Dino Buljubasic]

How can I check if a file is already open before trying to delete it
programmatically?

something like this


if file is open

close it first

end if

then delete file


thank you
_dino_

 

[Boudewijn Dijkstra]

How can I check if a file is already open before trying to delete it
programmatically?

java.io.File#canWrite()

 

[hilz]

How can I check if a file is already open before trying to delete it
programmatically?

something like this


if file is open

close it first

end if

then delete file


thank you
_dino_

if the file was opened by a process different than your program, you
cannot close it.
so in this case, your code should be:

if file is open

delete it

else

display error message

end if


HTH

 

[Roedy Green]

if file is open

close it first

end if

then delete file

If you have a handle to an OutputStream and the logic makes it unclear
whether it is open or closed at any point, say because of exceptions,
use the convention of setting the handle to null before opening and
after closing. Then by testing for null, you can tell an open from a
closed file. Of course this will tell you nothing about what other
tasks or threads or even handles to the same file in the same thread
are doing.

 

[Roedy Green]

Then by testing for null, you can tell an open from a
closed file.

you will often see code of this form:

if ( os != null ) os.close();