public Fits(URL myURL) throws FitsException {
  try {
    streamInit(FitsUtil.getURLStream(myURL,0));
  }
 catch (  IOException e) {
    throw new FitsException("Unable to open input from URL:" + myURL,e);
  }
}

public Fits ( URL myURL ) throws FitsException { try { streamInit ( FitsUtil . getURLStream ( myURL , 0 ) ) ; } catch ( IOException e ) { throw new FitsException ( "Unable to open input from URL:" + myURL , e ) ; } }
associate the fits object with a given url
