copying and moving files in Java ?

Thread view:

me2 - 05 Nov 2006 18:00 GMT

I need to do some plain file copying and moving from Java code. If I was
doing it in Linux, I'd be doing "mv file1 dir1" or "cp file2 dir2", that
sort of thing.

How do I do this in Java without using a system call to mv or cp ? And I
don't want to open the file, make a new file and copy the contents from
one to another, at least if I don't have to.

Thanks.

Reply to this Message

ge0rge - 05 Nov 2006 18:38 GMT

> I need to do some plain file copying and moving from Java code. If I was
> doing it in Linux, I'd be doing "mv file1 dir1" or "cp file2 dir2", that
[quoted text clipped - 3 lines]
> don't want to open the file, make a new file and copy the contents from
> one to another, at least if I don't have to.

Go and read the Java Tutorial on file IO
http://java.sun.com/docs/books/tutorial/essential/io/file.html

Do a search on java file copy on Google.

You will definitely find what you are looking for.

Signature

In the strict scientific sense we all feed on death -- even vegetarians.
-- Spock, "Wolf in the Fold", stardate 3615.4

Reply to this Message

Shanmuhanathan T - 06 Nov 2006 11:56 GMT

me2 said,on 05/11/2006 11:30 PM:

> I need to do some plain file copying and moving from Java code. If I was
> doing it in Linux, I'd be doing "mv file1 dir1" or "cp file2 dir2", that
[quoted text clipped - 5 lines]
>
> Thanks.

try the java NIO libarary - it provides a faster mechanism for file I/O.

one good tutorial is at
www.ibm.com/developerworks/java/edu/j-dw-java-nio-i.html
(registration required....blah blah)

Regards,
Shanmu.

Signature

When told he was making more per year than the President,
Babe Ruth replied, "Well, I had a better year than he did."

Reply to this Message

me2 - 08 Nov 2006 00:09 GMT

> me2 said,on 05/11/2006 11:30 PM:
>> I need to do some plain file copying and moving from Java code. If I was
[quoted text clipped - 15 lines]
> Regards,
> Shanmu.

So there is no File.copy() or anything like that ? I need to move and copy
files from one directory to another.

Reply to this Message

Tor Iver Wilhelmsen - 08 Nov 2006 08:04 GMT

> So there is no File.copy() or anything like that ? I need to move and copy
> files from one directory to another.

Copying files means reading from one and writing to another. Remember
to read and write from/to arrays and not single bytes.

Reply to this Message

Ingo R. Homann - 08 Nov 2006 12:00 GMT

Hi,

> Copying files means reading from one and writing to another. Remember
> to read and write from/to arrays and not single bytes.

Note that for a remote directory (e.g. Samba), it would be very useful
if there was a "native" Copy-Method that does not need to transfer the
file over the network to the 'local' computer and than back to the
remote computer.

Ciao,
Ingo

Reply to this Message

copying and moving files in Java ?

Free Magazines