Copy directory

private  void copyDirectory(File sourceLocation , File targetLocation) throws IOException {
 
      if (sourceLocation.isDirectory()) {
          if (!targetLocation.exists()) {
              targetLocation.mkdir();
          }
 
          String[] children = sourceLocation.list();
          for (int i=0; i<children.length; i++) {
              copyDirectory(new File(sourceLocation, children[i]),
                      new File(targetLocation, children[i]));
          }
      } else {
 
          InputStream in = new FileInputStream(sourceLocation);
          OutputStream out = new FileOutputStream(targetLocation);
 
          // Copy the bits from instream to outstream
          byte[] buf = new byte[1024];
          int len;
          while ((len = in.read(buf)) > 0) {
              out.write(buf, 0, len);
          }
          in.close();
          out.close();
      }
  }