See: Description
| Package | Description | 
|---|---|
| java.io | Defines a subset of the java.io package in the standard Java programming 
  language. | 
| java.lang | Provides classes that are fundamental to the design of the Java Card technology 
  subset of the Java programming language. | 
| java.rmi | Defines the Remote interface which 
identifies interfaces whose methods can be invoked from card 
acceptance device (CAD) client applications. | 
| javacard.framework | Provides a framework of classes and interfaces for building,
communicating with and working with Java Card technology-based applets. | 
| javacard.framework.service | This optional extension package provides a service framework of classes and interfaces that allow a
Java Card technology-based applet to be designed as an aggregation of
service components. | 
| javacard.security | Provides classes and interfaces that contain publicly-available functionality 
  for implementing a security and cryptography framework on the Java Card 
  platform. | 
| javacardx.annotations | Extension package that contains annotations for defining character string constants. | 
| javacardx.apdu | Extension package that enables support for ISO7816 specification
defined optional APDU related mechanisms. | 
| javacardx.apdu.util | Extension package that contains the APDUUtil class which contains utility functions
to parse CLA byte from a command APDU. | 
| javacardx.biometry | Extension package that contains functionality for implementing a
biometric framework on the Java Card platform. | 
| javacardx.biometry1toN | Extension package that contains functionality for implementing a
1:N biometric framework on the Java Card platform. | 
| javacardx.crypto | Extension package that contains functionality, which may be subject to export 
  controls, for implementing a security and cryptography framework on the 
  Java Card platform. | 
| javacardx.external | Extension package that provides mechanisms to access memory subsystems 
which are not directly addressable by the Java Card runtime
environment(Java Card RE) on the Java Card platform. | 
| javacardx.framework.math | Extension package that contains common utility functions for BCD
math and parity computations. | 
| javacardx.framework.string | Extension package that contains common utility functions for
manipulating UTF-8 encoded character strings. | 
| javacardx.framework.tlv | Extension package that contains functionality, for managing
storage for BER TLV formatted data, based on the ASN.1 BER encoding rules
of ISO/IEC 8825-1:2002, as well as parsing and editing BER
TLV formatted data in I/O buffers. | 
| javacardx.framework.util | Extension package that contains common utility functions for
manipulating arrays of primitive components - byte, short
or int. | 
| javacardx.framework.util.intx | Extension package that contains common utility functions for using
int components. | 
| javacardx.security | Extension package that contains functionality, for implementing security
 countermeasures to protect security relevant applet assets on the Java Card
 platform. | 
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