NIO file copying

public class FileUtils{
public static void copyFile(File in, File out)
throws IOException
{
FileChannel inChannel = new
FileInputStream(in).getChannel();
FileChannel outChannel = new
FileOutputStream(out).getChannel();
try {
inChannel.transferTo(0, inChannel.size(),
outChannel);
}
catch (IOException e) {
throw e;
}
finally {
if (inChannel != null) inChannel.close();
if (outChannel != null) outChannel.close();
}
}

public static void main(String args[]) throws IOException{
FileUtils.copyFile(new File(args[0]),new File(args[1]));
}
}



for larger file ( 64mb above )

try {
// magic number for Windows, 64Mb - 32Kb)
int maxCount = (64 * 1024 * 1024) - (32 * 1024);
long size = inChannel.size();
long position = 0;
while (position < size) {
position +=
inChannel.transferTo(position, maxCount, outChannel);
}

references:
1. http://www.javalobby.org/java/forums/t17036.html
2. http://www.rgagnon.com/javadetails/java-0064.html