Copy File in Java

Copy disk file:

private void copyFile(String fromDir, String todir, String frfile, String tofile) {

   String fromFile = fromDir + sep + frfile;
   String outFileName = todir + sep + tofile; 
   try {
       FileChannel src = new FileInputStream(fromFile).getChannel();
       FileChannel dst = new FileOutputStream(outFileName).getChannel();
       dst.transferFrom(src, 0, src.size());
       src.close();
       dst.close();
       log.info("Created file: " + outFileName);
   } catch (IOException e) {
       log.error("Error copying file " + frfile + " from " + fromDir, e);
   }
}