Moving files from one Folder to other using java

import java.lang.*
import java.io.*
public class MoveFile
{
         //File or Directory to be moved
         File file = new File ();
         // Destination directory
         File dir = new File ();
         boolean Success = file.renameTo (new File (dir, file.getName ()) );
         if (Success)
           System.out.println ("File Moved");
}