Implemented by objects that can have a {@code JMXServiceURL} address.
All {@link JMXConnectorServer} objects implement this interface.
Depending on the connector implementation, a {@link JMXConnector}
object may implement this interface too. {@code JMXConnector}
objects for the RMI Connector are instances of
{@link javax.management.remote.rmi.RMIConnector RMIConnector} which
implements this interface.
An object implementing this interface might not have an address
at a given moment. This is indicated by a null return value from
{@link #getAddress()}. | 