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## Package javacard.framework

Provides a framework of classes and interfaces for building, communicating with and working with Java Card technology-based applets.

See:
Description

Interface Summary
AppletEvent | The `AppletEvent` interface provides a callback interface for the Java Card runtime environment to inform the applet about life cycle events.
ISO7816 | `ISO7816` encapsulates constants related to ISO 7816-3 and ISO 7816-4.
MultiSelectable | The `MultiSelectable` interface identifies the implementing Applet subclass as being capable of concurrent selections.
PIN | This interface represents a PIN.
Shareable | The Shareable interface serves to identify all shared objects.

Class Summary
AID | This class encapsulates the Application Identifier (AID) associated with an applet.
APDU | Application Protocol Data Unit (APDU) is the communication format between the card and the off-card applications.
Applet | This abstract class defines an Java Card technology-based applet.
JCSystem | The `JCSystem` class includes a collection of methods to control applet execution, resource management, atomic transaction management, object deletion mechanism and inter-applet object sharing in the Java Card environment.
OwnerPIN | This class represents an Owner PIN, implements Personal Identification Number functionality as defined in the `PIN` interface, and provides the ability to update the PIN and thus owner functionality.
Util | The `Util` class contains common utility functions.

Exception Summary
APDUException | `APDUException` represents an `APDU` related exception.
CardException | The `CardException` class defines a field `reason` and two accessor methods `getReason()` and `setReason()`.
CardRuntimeException | The `CardRuntimeException` class defines a field `reason` and two accessor methods `getReason()` and `setReason()`.
ISOException | `ISOException` class encapsulates an ISO 7816-4 response status word as its `reason` code.
PINException | `PINException` represents a `OwnerPIN` class access-related exception.
SystemException | `SystemException` represents a `JCSystem` class related exception.
TransactionException | `TransactionException` represents an exception in the transaction subsystem.
UserException | `UserException` represents a User exception.

## Package javacard.framework Description

Provides a framework of classes and interfaces for building, communicating with and working with Java Card technology-based applets. These classes and interfaces provide the minimum required functionality for a Java Card environment. If additional functionality is desired, for example to specialize the card for a particular market, other frameworks would need to be added.

The key classes and interfaces in this package are:

- `AID`-encapsulates the Application Identifier (AID) associated with an applet.
- `APDU`-provides methods for controlling card input and output.
- `Applet`-the base class for all Java Card technology-based applets on the card. It provides methods for working with applets to be loaded onto, installed into and executed on a Java Card technology-compliant smart card.
- `CardException`, `CardRuntimeException`-provide functionality similar to `java.lang.Exception` and `java.lang.RuntimeException` in the standard Java programming language, but specialized for the card environment.
- `ISO7816`-provides important constants for working with input and output data.
- `JCSystem`-provides methods for controlling system functions such as transaction management, transient objects, object deletion mechanism, resource management, and inter-applet object sharing.
- `MultiSelectable`-provides methods that support advanced programming techniques with logical channels.
- `Shareable`-provides a mechanism that lets objects that implement this interface be shared across an applet firewall.
- `Util`-provides convenient methods for working with arrays and array data.

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