new file creation

[rahul saxena]

hi all,
I have generated pdf file. I have to rename tht file and send as attachment in mail. problem here is its renaming and sending mail with renamed file as attachment but i am not able to find renamed file in local system.
Also sometimes its very inconsistent , its giving "File not found Exception"(for previous file name)
please see the following code....
String filename = "C:\\test2222.txt";
FileDataSource fds = new FileDataSource(filename);
File file = fds.getFile();
if ( file.exists() ) {
File file1 = new File(filename);
file1.renameTo(new File("05012004.txt"));
}
can u please tell me how to make copy of original file and then renaming that file with new name? will this solve my problem?
thanks in advance..

[Stefan Krompass]

Hi,
try this code (untested):

File oldFile = new File(oldFilename);
File newFile = new File(newFilename);
if (oldFile.exists()) {
  oldFile.renameTo(newFile);
}

cu
Stefan

[rahul saxena]

Hi Stefan Krompass,
thanks for timely response. I am using same logic, it working fine but sometimes it cribs and I cant predict when it will give "file not found exception". but intrestingly old file will be there in local system.
Is it bcoz its trying to access file before its getting generated? It should not bcoz we are checking for oldFile.exists() condition. and also why i am not able to find newly named files? but attachments are going in mail with newname
Will it solve If I give delay of few seconds before attaching files ?
regards,
Shankar

[clio katz]

just a suggestion but:
(1) i'm not sure what FileDataSource class is doing, but I don't see why it should not have to relinquish it's file handle *before* you rename the file it has fetched for you... Will it not generate a FileNotFoundException sooner-or-later when it shuts-down/goes out of scope?
(2) i don't see anywhere that you give a (fully-qualified) filepath for the renamed file ... presumably it will be written to the 'current' directory - whatever that may be ... it may be better to give it an explicit path - at least you'll know where to look for it:-)
hth

[senthil doraiswamy]

its a good practice to check the return value (boolean type) of the renameTo method to conclude whether it performed the operation successfully or not. i had this issue when i tried to rename a file from one file system to another (equalent to unix "mv"), the return code i got was "false".

[rahul saxena]

Hi,
thanks for the response. Do u have any sample program for creating copy of .pdf file?
thanks in advance.

Originally posted by clio cat:
just a suggestion but:
(1) i'm not sure what FileDataSource class is doing, but I don't see why it should not have to relinquish it's file handle *before* you rename the file it has fetched for you... Will it not generate a FileNotFoundException sooner-or-later when it shuts-down/goes out of scope?
(2) i don't see anywhere that you give a (fully-qualified) filepath for the renamed file ... presumably it will be written to the 'current' directory - whatever that may be ... it may be better to give it an explicit path - at least you'll know where to look for it:-)
hth

[clio katz]

i don't have a sample, i was only suggesting mods to your code snippet:

String filename = "C:\\test2222.txt";
FileDataSource fds = new FileDataSource(filename);
File file = fds.getFile();
//NEW STMT to close fds:
fds.close(); // orwhatever correct method is...
if ( file.exists() ) {
File file1 = new File(filename);
//
// USE SAME PATH on rename (NOT necessarily hard-coded!)
//file1.renameTo(new File("05012004.txt"));
// rename can throw exceptions ... so try
try {
     // as per prev post, check result here too
     if (file1.renameTo(new File("C:\\05012004.txt"))) {
       System.out.println("This makes me very happy!");
     } else {
       System.out.println("This is cause for concern:-(");
     }
} catch (Exception e) { e.printStackTrace(); }
}

[Stefan Wagner]

Perhaps someone may move this to the IO Forum?

[Marilyn de Queiroz]

Good idea, Stefan.

[Joe Ess]

Originally posted by shankar cool:

Do u have any sample program for creating copy of .pdf file?

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