GetInstance Collection of utility methods to facilitate implementing getInstance() methods in the JCA/JCE/JSSE/... 
GetInstance.Instance Static inner class representing a newly created instance. 
JCAUtil Collection of static utility methods used by the security framework. 
ProviderList List of Providers. 
Providers Collection of methods to get and set provider list. 
ServiceId Simple class encapsulating a service type and algorithm for lookup.