file copying

[fenris]

I have looked on the internet in a couple of places (namely java.sun.com) to find some examples on how to copy files from one place to another on a local machine. I would prefer not to use calls to the local operating system to do it as it would affect protability. I have seen some methods that involve using the buffered input/output streams to read chunks of the file at a time. <br><br>I need something that is efficient and fast because I will be copying several hundred files of 5mb in average length between directories.<br><br>Any suggestions or input would be greatly appreciated. Thanks <p> fenris<br><a href=mailto:fenris@hotmail.com>fenris@hotmail.com</a><br><a href= > </a><br> I am interested in Mining Software, as well as Genetic Algorithms.

 

[carpeliam]

I guess you might read in a file, and then save it as another file- you'd need to have a name-generating method. But you already knew that- what exactly do you need to know? <p>Liam Morley<br><a href=mailto:lmorley@wpi.edu>lmorley@wpi.edu</a><br><a href=

http://www.wpi.edu/~lmorley/>

] :: imotic :: website :: [</a><br>"light the deep, and bring silence to the world.<br>
light the world, and bring depth to the silence."

 

[fenris]

What I want is to be able to copy files efficently over a network drive, maybe using multiple threads. Here is what I have so far and it works and suggestions for improvement would be appreciated:<br><br>import java.io.*;<br><br><br>public class CopyFile<br>{<br> public static void main(String[] args) throws IOException<br> {<br> new CopyFile(args);<br> }<br><br> public CopyFile(String args[]) throws IOException<br> {<br> byte[] buff = new byte[1048576];<br> BufferedInputStream bis;<br> BufferedOutputStream bos;<br><br> <br><br> if (args.length &lt; 2)<br> System.out.println(&quot;Command Syntax: CopyFile &lt;source&gt;&lt;dest&gt;\n\n&lt;source&gt;\tThe source File name (path optional)\n&lt;dest&gt;\tThe destination file name (path optional)&quot;<br> else<br> try<br> {<br> bis = new BufferedInputStream(new FileInputStream(args[0])); //source<br> bos = new BufferedOutputStream(new FileOutputStream(args[1])); //destination<br><br> //determine the size of the buffer to allocate<br> //File source = new File(args[0]);<br> //int fileLength = (int) source.length();<br> int size;<br> <br> while ((size = bis.read(buff)) &gt; -1){bos.write(buff,0,size);}<br><br> bis.close();<br> bos.close();<br> <br> }<br> catch(FileNotFoundException fnfe){System.out.println(args[0] + &quot; does not exist&quot;}<br> catch(IOException ioe){System.out.println(&quot;Error Reading/Writing the File&quot;}<br> <br> <br> <br><br> }<br><br>}<br><br> <p> fenris<br><a href=mailto:fenris@hotmail.com>fenris@hotmail.com</a><br><a href= > </a><br> I am interested in Mining Software, as well as Genetic Algorithms.