problem in copying the directory

[trinadh reddy]

from java program iam trying to copy a directory which contain subdirectories and other files to other directory.but is isnot creating the directory in that location
Runtime r = Runtime.getRuntime();
System.out.println("before xcopy");
Process p = r.exec("cmd /c start xcopy d:/trinadh d:/surya/trinadh");
System.out.println("after executing xcopy");
iam trying to copy the directory trinadh into surya directory
what is the problem with this programm.plese tell me the solution for this

[Ramender Mall]

Hi Trinadh..

Try using

 
 Process p = r.exec("cmd /c start xcopy d:\\trinadh d:\\surya\\trinadh");

In place of -->Process p = r.exec("cmd /c start xcopy d:/trinadh d:/surya/trinadh");

Because I just tried only the xcopy part of your code on the commandline and it gace an error on invalid switch...may be thats why its not giving you the desired output..

Be sure to put 2 backward slashes in the 1st line( otherwise it will take it as any escape character)...

Try it..
Ramy..

[Tony Morris]

Why are you stepping outside of the VM instead of using the core API?
Take a look at java.io.File.

[trinadh reddy]

Process p = r.exec("cmd /c start xcopy d:\\trinadh d:\\surya\\trinadh");
when iam trying to copy the files are copying but the subdirectories anf the files in that subdirectories are not copying.please tell me the solution for this

[Joanne Neal]

Have you tried running the command at a DOS prompt to make sure it works. I think you'll find you need to specify some options. Type xcopy /? to get a list of options.

[pvsr rao]

how to copy the whole directory with java.io.File

[Sri Ram]

a sample code for copying the files from a directory.
Check this link

[pvsr rao]

when i tried with that it is copying the empty direcory but not all its subdirectories.iam sending my program also
import java.io.*;
public class copy
{

private void copyFile(File src, File dst) throws IOException
{
InputStream in = new FileInputStream(src);
OutputStream out = new FileOutputStream(dst);

// Transfer bytes from in to out
byte[] buf = new byte[1024];
int len;
while ( (len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
in.close();
out.close();

}

public int copyDirectory(File srcDir, File dstDir) throws IOException
{
if (srcDir.isDirectory())
{
if (!dstDir.exists())
{
dstDir.mkdir();
}

String[] children = srcDir.list();
int c= children.length;
System.out.println(c);
for (int i = 0; i < children.length; i++) {
copyDirectory(new File(srcDir, children[i]),
new File(dstDir, children[i]));
}
}
else {
// This method is implemented in e1071 Copying a File
copyFile(srcDir, dstDir);
}
return 1;
};


public static void main(String args[]) throws IOException {

copy c = new copy();
c.copyDirectory(new File("d:/raj/sub "),new File("d:/sub"));
c.copyFile(new File("d:/raj/sub/auth.html"),new File("d:/sub/auth.html")) ;
}
}

pleaase help me how to resolve this problem