public PacProxySelector(String pacUrl){
  if (pacUrl == null) {
    throw new NullPointerException();
  }
  this.pacUrl=pacUrl;
}

public PacProxySelector ( String pacUrl ) { if ( pacUrl == null ) { throw new NullPointerException ( ) ; } this . pacUrl = pacUrl ; }
construct pacproxyselector using an automatic proxy configuration url . loads the pac script from the supplied url .
