Java Files set file owner

import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.FileOwnerAttributeView;
import java.nio.file.attribute.UserPrincipal;
import java.nio.file.attribute.UserPrincipalLookupService;

public class Main {

   public static void main(String[] args) {
      Path path = Paths.get("Main.java");

      try {// ww w.j  a v a 2  s .  c  om
         FileOwnerAttributeView view = Files.getFileAttributeView(path, FileOwnerAttributeView.class);

         UserPrincipalLookupService lookupService = FileSystems.getDefault().getUserPrincipalLookupService();
         UserPrincipal userPrincipal = lookupService.lookupPrincipalByName("mary");

         Files.setOwner(path, userPrincipal);
         System.out.println("Owner: " + view.getOwner().getName());
      } catch (IOException ex) {
         ex.printStackTrace();
      }

   }
}