Renaming and Moving Files: - Java

On 7 Sie, 16:39, Danger_Duck <ganggang3s...@gmail.com> wrote:
> So like, I know that when you copy a file, you do something along the
> lines of:
>
> FileChannel ic = new FileInputStream("source.txt").getChannel();
> FileChannel oc = new FileOutputStream("target.txt").getChannel();
> ic.transferTo(0, ic.size(), oc);
> ic.close();
> oc.close();
>
> However, I have no intention of copying a file-at the end of my
> program, I'd like to rename one file and move another. How do I
> accomplish this?
>
> By the way, I tried something along the lines of:
>
> res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
> "_results.txt")));
>
> so could someone explain the proper way to use the method or recommend
> a better one?
>
> Thanks!
>
> (Again, just how to MOVE and RENAME a file on the hardisk through
> Java)
> -The Duck

Try to use java.io.File.renameTo(File) method.
Note that moving file "might not succeed if a file with the
destination abstract pathname already exists" (http://java.sun.com/
javase/6/docs/api/java/io/File.html).

Przemek

Danger_Duck wrote:
> So like, I know that when you copy a file, you do something along the
> lines of:
>
> FileChannel ic = new FileInputStream("source.txt").getChannel();
> FileChannel oc = new FileOutputStream("target.txt").getChannel();
> ic.transferTo(0, ic.size(), oc);
> ic.close();
> oc.close();
>
> However, I have no intention of copying a file-at the end of my
> program, I'd like to rename one file and move another. How do I
> accomplish this?
>
> By the way, I tried something along the lines of:
>
> res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
> "_results.txt")));
>
> so could someone explain the proper way to use the method or recommend
> a better one?
>
> Thanks!
>
> (Again, just how to MOVE and RENAME a file on the hardisk through
> Java)
> -The Duck
You might want to look at File - it has builtins that do what you want:

File file = new File("path to the file");
file. \\delete(), renameTo(), etc.


--
Dave Miller
Java Web Hosting at:
http://www.cheap-jsp-hosting.com/

Danger_Duck wrote:
> So like, I know that when you copy a file, you do something along the
> lines of:
>
> FileChannel ic = new FileInputStream("source.txt").getChannel();
> FileChannel oc = new FileOutputStream("target.txt").getChannel();
> ic.transferTo(0, ic.size(), oc);
> ic.close();
> oc.close();
>
> However, I have no intention of copying a file-

So the first ten lines of your message are just starchy
filler, right?

> at the end of my
> program, I'd like to rename one file and move another. How do I
> accomplish this?
>
> By the way, I tried something along the lines of:
>
> res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
> "_results.txt")));

Well, that'd be the way to rename a file, assuming res is a File
and resultsLocation is something with a concat() method that returns
a String or a URI. What happened when you tried it?

> so could someone explain the proper way to use the method or recommend
> a better one?
>
> Thanks!
>
> (Again, just how to MOVE and RENAME a file on the hardisk through
> Java)

To rename a file, see above. To move a file -- well, you'd
better describe what you mean by "move."

--
Eric.Sosman@sun.com

On Aug 7, 11:16 am, Eric Sosman <Eric.Sos...@sun.com> wrote:
> Danger_Duck wrote:
> > So like, I know that when you copy a file, you do something along the
> > lines of:
>
> > FileChannel ic = new FileInputStream("source.txt").getChannel();
> > FileChannel oc = new FileOutputStream("target.txt").getChannel();
> > ic.transferTo(0, ic.size(), oc);
> > ic.close();
> > oc.close();
>
> > However, I have no intention of copying a file-
>
>      So the first ten lines of your message are just starchy
> filler, right?
>
> > at the end of my
> > program, I'd like to rename one file and move another. How do I
> > accomplish this?
>
> > By the way, I tried something along the lines of:
>
> > res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
> > "_results.txt")));
>
>      Well, that'd be the way to rename a file, assuming res is a File
> and resultsLocation is something with a concat() method that returns
> a String or a URI.  What happened when you tried it?
>
> > so could someone explain the proper way to use the method or recommend
> > a better one?
>
> > Thanks!
>
> > (Again, just how to MOVE and RENAME a file on the hardisk through
> > Java)
>
>      To rename a file, see above.  To move a file -- well, you'd
> better describe what you mean by "move."
>
> --
> Eric.Sos...@sun.com

When I tried (res is the existing file),
res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
> "_results.txt")))

I indeed found a new file with the name I specified. Unfortunately, it
was blank, as the 0kb size confirmed. That's why I either need help
with renameTo or a better method.

By the way, res already exists (with contents and 1kb in size), and
was opened using:
File res = new File(resultsLocation.concat("/results.txt"));

I'm on a Windows XP by the way, if that matters...

On 7 Sie, 17:30, Danger_Duck <ganggang3s...@gmail.com> wrote:
> On Aug 7, 11:16 am, Eric Sosman <Eric.Sos...@sun.com> wrote:
>
>
>
> > Danger_Duck wrote:
> > > So like, I know that when you copy a file, you do something along the
> > > lines of:
>
> > > FileChannel ic = new FileInputStream("source.txt").getChannel();
> > > FileChannel oc = new FileOutputStream("target.txt").getChannel();
> > > ic.transferTo(0, ic.size(), oc);
> > > ic.close();
> > > oc.close();
>
> > > However, I have no intention of copying a file-
>
> >      So the first ten lines of your message are just starchy
> > filler, right?
>
> > > at the end of my
> > > program, I'd like to rename one file and move another. How do I
> > > accomplish this?
>
> > > By the way, I tried something along the lines of:
>
> > > res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
> > > "_results.txt")));
>
> >      Well, that'd be the way to rename a file, assuming res is a File
> > and resultsLocation is something with a concat() method that returns
> > a String or a URI.  What happened when you tried it?
>
> > > so could someone explain the proper way to use the method or recommend
> > > a better one?
>
> > > Thanks!
>
> > > (Again, just how to MOVE and RENAME a file on the hardisk through
> > > Java)
>
> >      To rename a file, see above.  To move a file -- well, you'd
> > better describe what you mean by "move."
>
> > --
> > Eric.Sos...@sun.com
>
> When I tried (res is the existing file),
> res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
>
> > "_results.txt")))
>
> I indeed found a new file with the name I specified. Unfortunately, it
> was blank, as the 0kb size confirmed. That's why I either need help
> with renameTo or a better method.
>
> By the way, res already exists (with contents and 1kb in size), and
> was opened using:
> File res = new File(resultsLocation.concat("/results.txt"));
>
> I'm on a Windows XP by the way, if that matters...

Try to use java.io.File.exists() method to ensure that source file
exists and target does not.
I am not not sure about XP, but maybe there is problem with file
separator character: '/'.

Przemek

On Aug 7, 11:49 am, "tomaszewski.p" <kssw...@gmail.com> wrote:
> On 7 Sie, 17:30, Danger_Duck <ganggang3s...@gmail.com> wrote:
>
>
>
> > On Aug 7, 11:16 am, Eric Sosman <Eric.Sos...@sun.com> wrote:
>
> > > Danger_Duck wrote:
> > > > So like, I know that when you copy a file, you do something along the
> > > > lines of:
>
> > > > FileChannel ic = new FileInputStream("source.txt").getChannel();
> > > > FileChannel oc = new FileOutputStream("target.txt").getChannel();
> > > > ic.transferTo(0, ic.size(), oc);
> > > > ic.close();
> > > > oc.close();
>
> > > > However, I have no intention of copying a file-
>
> > >      So the first ten lines of your message are just starchy
> > > filler, right?
>
> > > > at the end of my
> > > > program, I'd like to rename one file and move another. How do I
> > > > accomplish this?
>
> > > > By the way, I tried something along the lines of:
>
> > > > res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
> > > > "_results.txt")));
>
> > >      Well, that'd be the way to rename a file, assuming res is a File
> > > and resultsLocation is something with a concat() method that returns
> > > a String or a URI.  What happened when you tried it?
>
> > > > so could someone explain the proper way to use the method or recommend
> > > > a better one?
>
> > > > Thanks!
>
> > > > (Again, just how to MOVE and RENAME a file on the hardisk through
> > > > Java)
>
> > >      To rename a file, see above.  To move a file -- well, you'd
> > > better describe what you mean by "move."
>
> > > --
> > > Eric.Sos...@sun.com
>
> > When I tried (res is the existing file),
> > res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
>
> > > "_results.txt")))
>
> > I indeed found a new file with the name I specified. Unfortunately, it
> > was blank, as the 0kb size confirmed. That's why I either need help
> > with renameTo or a better method.
>
> > By the way, res already exists (with contents and 1kb in size), and
> > was opened using:
> > File res = new File(resultsLocation.concat("/results.txt"));
>
> > I'm on a Windows XP by the way, if that matters...
>
> Try to use java.io.File.exists() method to ensure that source file
> exists and target does not.
> I am not not sure about XP, but maybe there is problem with file
> separator character: '/'.
>
> Przemek

Hmm, I'll try "\\" instead and see how it goes...

On Aug 7, 11:49 am, "tomaszewski.p" <kssw...@gmail.com> wrote:
> On 7 Sie, 17:30, Danger_Duck <ganggang3s...@gmail.com> wrote:
>
>
>
> > On Aug 7, 11:16 am, Eric Sosman <Eric.Sos...@sun.com> wrote:
>
> > > Danger_Duck wrote:
> > > > So like, I know that when you copy a file, you do something along the
> > > > lines of:
>
> > > > FileChannel ic = new FileInputStream("source.txt").getChannel();
> > > > FileChannel oc = new FileOutputStream("target.txt").getChannel();
> > > > ic.transferTo(0, ic.size(), oc);
> > > > ic.close();
> > > > oc.close();
>
> > > > However, I have no intention of copying a file-
>
> > >      So the first ten lines of your message are just starchy
> > > filler, right?
>
> > > > at the end of my
> > > > program, I'd like to rename one file and move another. How do I
> > > > accomplish this?
>
> > > > By the way, I tried something along the lines of:
>
> > > > res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
> > > > "_results.txt")));
>
> > >      Well, that'd be the way to rename a file, assuming res is a File
> > > and resultsLocation is something with a concat() method that returns
> > > a String or a URI.  What happened when you tried it?
>
> > > > so could someone explain the proper way to use the method or recommend
> > > > a better one?
>
> > > > Thanks!
>
> > > > (Again, just how to MOVE and RENAME a file on the hardisk through
> > > > Java)
>
> > >      To rename a file, see above.  To move a file -- well, you'd
> > > better describe what you mean by "move."
>
> > > --
> > > Eric.Sos...@sun.com
>
> > When I tried (res is the existing file),
> > res.renameTo(new File(resultsLocation.concat("/" + test.getName() +
>
> > > "_results.txt")))
>
> > I indeed found a new file with the name I specified. Unfortunately, it
> > was blank, as the 0kb size confirmed. That's why I either need help
> > with renameTo or a better method.
>
> > By the way, res already exists (with contents and 1kb in size), and
> > was opened using:
> > File res = new File(resultsLocation.concat("/results.txt"));
>
> > I'm on a Windows XP by the way, if that matters...
>
> Try to use java.io.File.exists() method to ensure that source file
> exists and target does not.
> I am not not sure about XP, but maybe there is problem with file
> separator character: '/'.
>
> Przemek

Meh, still blank

Have you used this before? If so, could you give me an example so I
can compare what I'm doing to what works? Thanks.

Danger_Duck wrote:

> Meh, still blank
>
> Have you used this before? If so, could you give me an example so I
> can compare what I'm doing to what works? Thanks.

Run the following program few times and ****yze the results:

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class FileRenameExample {

public static void main(String[] args) throws IOException {
File f = new File("test-file.txt").getCanonicalPath();
if (! f.exists()) {
FileWriter fw = new FileWriter(f);
fw.write("Ala ma kota");
fw.close();
System.out.println("created file " + f.);
} else {
System.out.println("file " + f.getCanonicalPath() + " exists");
}

File f2 = new File("test-file-renamed.txt");
if (f.renameTo(f2)) {
System.out.println("renamed to " + f2.getCanonicalPath());
} else {
System.out.println("can't rename to " + f2.getCanonicalPath());
}
}
}


piotr

Danger_Duck wrote:

> Meh, still blank
>
> Have you used this before? If so, could you give me an example so I
> can compare what I'm doing to what works? Thanks.

Run the following program few times and ****yze the results:

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class FileRename {

public static void main(String[] args) throws IOException {
File f = new File("test-file.txt").getCanonicalFile();
if (! f.exists()) {
FileWriter fw = new FileWriter(f);
fw.write("Ala ma kota");
fw.close();
System.out.println("created file " + f);
} else {
System.out.println("file " + f + " exists");
}

File f2 = new File("test-file-renamed.txt").getCanonicalFile();
if (f.renameTo(f2)) {
System.out.println("renamed to " + f2);
} else {
System.out.println("can't rename to " + f2);
}
}
}


piotr