public static void addURL(URL u) throws IOException {
  Class sysclass=URLClassLoader.class;
  try {
    Method method=sysclass.getDeclaredMethod("addURL",URL.class);
    method.setAccessible(true);
    method.invoke(sysLoader,u);
  }
 catch (  Throwable t) {
  }
}

public static void addURL ( URL u ) throws IOException { Class sysclass = URLClassLoader . class ; try { Method method = sysclass . getDeclaredMethod ( "addURL" , URL . class ) ; method . setAccessible ( true ) ; method . invoke ( sysLoader , u ) ; } catch ( Throwable t ) { } }
expand the classpath to include the provided url
