this.query = null;
  protected void set(String protocol, String host, int port, String file,		     String ref)  {    // TBD: Theoretically, a poorly written StreamHandler could pass an    // invalid protocol.  It will cause the handler to be set to null    // thus overriding a valid handler.  Callers of this method should    // be aware of this.    this.handler = setURLStreamHandler(protocol);    this.protocol = protocol;    this.port = port;    this.host = host;    this.file = file;    this.ref = ref;    hashCode = hashCode();			// Used for serialization.  }